Arquivo404 more powerful! has been launching innovative complementary services useful for organizations to optimize their functioning.

The new release of named Helios was launched on November 13, 2023 and includes developments in Arquivo404 and CitationSaver.

Arquivo404 with new methods for defining time intervals

Arquivo404 is a service that presents website users with links to web-archived versions, instead of laconic “Page not found” error messages.

However, sometimes it is necessary to specify the correct version of a web-archived page to be displayed. For example, a website’s domain may have belonged to another entity in the past, and only web-archived versions since the website came under its current owners should to be displayed.

For this purpose, 3 new methods for configuring Arquivo404 were released :

  • setMinimumDate( minDate : Date ) – specifies the earliest date of the web-archived version of the URL that can be displayed.
  • setMaximumDate( maxDate : Date ) – specifies the latest date of the web-archived version of the URL that can be displayed.
  • setMostRelevantMemento( criterion : ‘oldest’ | ‘most-recent’ ) – specifies the order of results for the versions retrieved from the web archive. By default, the oldest version is displayed ( ‘oldest’ ).

In short, Arquivo404 now allows you to define whether to display the oldest or most recent web-archived page to the users, within a certain time interval.

CitationSaver processes HTML documents

CitationSaver is a service that extracts citations in documents to online resources and archives them. This service is particularly useful for maintaining the integrity of scientific articles and the reproducibility of the experiments and studies described in them.

Many open-access articles are published in hypertext format (HMTL). CitationSaver now processes documents in HTML format, in addition to PDF and TXT formats.

For example, if a user finds an article on the Web  which contains citations to online resources, he/she simply needs to submit the URL of the article into CitationSaver. The URLs cited in the article will be extracted and their content will be web-archived for later access.

Example of an article from the Journal of Integrated Coastal Management, available on SciELO

Know more

Give us feedback about our services and if you detect any issue, please contact us.

World Digital Preservation Day dedicated to Justice

Last updated on November 13th, 2023 at 08:59 am

The Instituto de Gestão Financeira e Equipamentos da Justiça (IGFEJ) and Secretaria Geral do Ministério da Justiça (SGMJ), in collaboration with BAD, organized the event “Digital Preservation in Justice” to mark World Digital Preservation Day on November 2, 2023.

The event, which took place in the auditorium of the Polícia Judiciária in Lisbon, was attended by representatives from the government’s justice department and professionals from the archives, communications and IT departments.

How to use to preserve institutional websites took part in the presentation “Preserve your website”, which addressed the issue of preserving institutional websites and critical aspects such as cybersecurity.

Justice entities can benefit from and its various services to ensure good preservation of their websites, mitigate cybersecurity threats and provide historical content to citizens.

The presentation concluded with the following recommendations:

  • Inventory and publicize your current and historical websites
  • Use services collaboratively
  • Save content in a standardized format with


Prepare a work for the Award 2024!


Last updated on March 4th, 2024 at 10:46 am


Until May 6, 2024, is launching the challenge of creating a work based on  historical information preserved from the Web.

In this 7th edition of the Award, €15,000 will be awarded to the 3 best works (€10,000 for 1st place), plus 3 honorable mentions.

Know more at:

Honorable mentions for authors and professors

To promote the use of the in the context of teaching, research or professional usage, three partners institutions promoted honorable mentions with an associated prize.

  • The Público newspaper will award an Honorable Mention to works based on the Público online content preserved by
  • The Aveiro Media Competence Center (AMCC) will award an Honorable Mention to the best work on the web archive of one or more Portuguese online media.
  • Association DNS.PT will award an Honorable Mention to a professor or teacher who has encouraged the submission of works.

Share and spread the word!

Help us spreading the word about the Award 2024 among potential candidates!

University of Lisbon preserved over 100 historical websites in the Memorial


Last updated on March 27th, 2024 at 11:17 am

More than 100 historical websites from the Faculty of Sciences of the University of Lisbon (FCUL) are now accessible through the Memorial service of

FCUL’s IT Department sent to a list of old websites hosted on its servers that were no longer updated, but whose historical content continues to be interesting to the community (e.g. websites of research projects or scientific events). preserved these websites in collaboration with their ownersa, seeking to maintain a faithful representation of the published content for the future.

FCUL redirected the domain of each website to, and then, became able to disconnect the respective servers and  begin sparing the resources spent on their maintenance (e.g. electricity, data center space, human resources).

The show case of MiNEMA


Landing page of at Memorial do

The MiNEMA scientific program website was the first that FCUL integrated into the Memorial. This website stopped being updated in 2009 when the project ended. FCUL invested resources in maintaining the website for another 10 years until it became necessary to suspend it down for cybersecurity reasons.

The Memorial of emerged as an option and since 2020, FCUL just needs to maintain the domain while preserveS the information contained on the website.

Please note that the website’s content continues to be displayed in search engine results.

Follow FCUL and preserve your historical websites in the Memorial!

An increasing number of institutions are recurring to the Memorial of to safely preserve the content of their historical websites. For example, FCUL preserved 116 websites, the Government IT Network Management Center preserved 23 and the Foundation for Science and Technology preserved 40.

Public institutions have priority to benefit from this service. However, other entities can also request it as long as they own the website domain.

Identify your historical websites candidate to be integrated into the Memorial of and contact us!

To know more

Completing webpages from the past: it is possible!

Last updated on October 16th, 2023 at 06:59 pm

Some web-archived pages are reproduced incompletely due to problems occurred during the archiving process (e.g. deformatted or missing embedded images).

Complete page is a function of that allows to recover missing elements in web-archived pages, from other web archives or the original websites.

When a user views a page archived in, just needs to access the Options menu in the top right corner and choose Complete page.

This process is performed automatically.

How does Complete page work?

If you open a web-archived page that appears incomplete, try the Complete page option and wait. will search for missing elements on the Internet and in other web archives using the Memento protocol. If it succeeds, the obtained elements will be immediately displayed on the web-archived page.

Later, these recovered elements are integrated into the collection, so that the web-archived page will appear more complete in the future accesses performed by any user.


Completing the home page of artist Cristina Guerra’s website found a missing image.

For example, the website of artist Cristina Guerra archived in 2005 had a missing image. By using Complete page, it was possible in 2021 to obtain this missing image from another web archive which preserved it.

Participate in collaborative curation to improve the quality of!

Due to the high number of web-archived pages, it is not possible for to complete them all automatically. Therefore, the collaboration of users to identify important pages with missing elements and try to complete them is important.

By using Complete page, the users are contributing to improve the quality of the historical webpages preserved in!

Always give it a try to complete web-archived pages may that look incomplete. If you detect any problem, contact us.

Spread the word about the Complete page!

Cross-lingual research datasets on 2019 European Parliamentary Elections

Daniel Gomes and Diego Alves at presenting at CLEOPATRA final event

Last updated on March 17th, 2024 at 03:04 pm preserved online documents in several languages about the 2019 European Parliamentary Elections

The 2019 European Parliamentary Elections were an event of international relevance. The strategy to preserve the relevant information on the World Wide Web is delegated to national institutions. However, the preservation of web pages that document transnational events is not officially assigned. 

The team, with the aim of preserving the cross-lingual online content that documents this event, applied a combination of human and automatic selection processes.

The process of generating the collection about the 2019 European Parliamentary Elections was performed in two steps.

In the first step, 40 relevant terms in Portuguese about the 2019 European Parliamentary Elections were identified, and then, automatically translated into the 24 official languages of the European Union: Bulgarian, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Irish, Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian, Slovak, Slovenian, Spanish and Swedish. 

These translations were reviewed in collaboration with the Publications Office of the European Union. Besides that, in parallel, a collaborative list was launched to gather contributions of relevant seeds from the international community.

In the second step, the team iteratively ran 6 crawls (99 million web files, 4.8 TB) using different configurations and crawling software, to maximize the quality of the collected content. 

The obtained web-data was aggregated into one special collection identified as EAWP23 and became searchable and accessible through in July 2020 (

CLEOPATRA project: Cross-lingual Event-centric Open Analytics Research Academy

Daniel Gomes and Diego Alves at presenting at CLEOPATRA final event
Daniel Gomes and Diego Alves at presenting at CLEOPATRA final event

The CLEOPATRA ITN was a Marie Skłodowska-Curie Innovative Training Network aimed to generate ways to better understand the massive digital coverage of major events in Europe over the past decades. 

The main goal was to facilitate advanced cross-lingual processing of textual and visual information related to key contemporary events at large scale and develop innovative methods for efficient access and interaction with multilingual information.

In total, 14 Early-Stage Researchers hosted across 9 European Universities developed their research while enrolled as Ph.D. students. 

Associated partners such as contributed to CLEOPATRA by hosting and training early-stage researchers such as Diego Alves. As part of the training program, he conducted a secondment at in Lisbon from June to August 2022. 

The idea was to develop part of his research about syntactic structures of EU languages using the textual resources preserved by the and exchange knowledge with the web-archiving experts on the strategies to extract and process historical web-data. 

Diego Alves defended his Ph.D thesis entitled Computational typological analysis of syntactic structures in European languages in July 2023 at the Faculty of Humanities and Social Sciences of the University of Zagreb (Croatia). 

Generating textual datasets for Natural Language Processing

Diego Alves’ work originated cross-lingual datasets about the 2019 European Parliamentary Elections precious for research.

This work will be detailed in chapter “Robustness of Corpus-based Typological Strategies for Dependency Parsing” of the open-access CLEOPATRA book entitled “Event Analytics across Languages and Communities”.

A 3-step Natural Language Processing pipeline was developed to generate research textual datasets that can be used in several types of digital humanities studies:

  1. Extract text: The textual content was extracted from each web-archived URL using the newspaper3k Python library. The language of each extracted text was determined using the langdetect library, to separate the texts written in different languages across distinct files;
  2. Clean extracted texts: a Python script was applied to clean the texts by removing unnecessary information (e.g.: repeated instances, empty lines, etc.);
  3. Double-check of language identification: the language of each cleaned extracted text was verified again to eliminate possible errors originated during the previous steps.

Two new research datasets are openly available!

The result was a dataset of cleaned and language-verified texts publicly available. Each file contains the texts in a given language about the 2019 European Union Elections. The distribution of extracted texts for each language is described in the figure below:

Number of tokens of each corpus extracted from the collection 2019 European Union Elections preserved by (EAWP23).
Number of tokens of each corpus extracted from the collection 2019 European Union Elections preserved by (EAWP23).

The aforementioned corpus was automatically annotated regarding part-of-speech and dependency relations to generate a corpus with syntactic information which is useful for linguistic studies. 

The multilingual model of the UDify tool (Kondratyuk and Straka, 2019) was applied. 

The texts in these annotated corpora followed the same order of the respective raw-texts files. Each sentence is annotated following the Universal Dependencies framework in the CoNNL-U format, which is the reference in terms of syntactic annotation in Natural Language Processing. Thus, each file in this dataset contains the annotated texts in a given language about the 2019 European Union Elections

The syntactically annotated texts about the 2019 European Elections are publicly available!

Know more preserves Wikipedia citations

Wikimedia Portugal e

Last updated on September 19th, 2023 at 01:49 pm

Wikipedia is an educational resource degraded by broken links preserves information published online so that it can be used later for research and educational purposes. For example, preserved online information about European projects funded by H2020 .

Wikipedia articles refer to external pages with important complementary information that has since become unavailable.
Wikipedia articles reference external web pages with important complementary information that became unavailable on their original websites.

One of the most used online resources for educational purposes are Wikipedia articles. However, Wikipedia articles sometimes reference external web pages with important complementary information which disappeared from their original websites. This problem degrades the quality of Wikipedia as a credible and verifiable source of information.

In August 2023, the team carried out an experiment to measure the percentage of external links (outside the domain) that were broken in Portuguese Wikipedia articles. The obtained results showed that 25% of the external links referenced in the Portuguese Wikipedia were broken.

There is also the problem that a link may refer to an accessible web page, but its content changed meanwhile and it is no longer what it was meant to be referenced (Content Drift problem). The domain of the hosting website may have meanwhile been purchased by third parties, for example for malicious purposes.

To mitigate these problems, launched a project to preserve the online references contained in Portuguese Wikipedia articles in collaboration with Wikimedia Portugal. The objective was to change the references to broken links on Wikipedia articles, to start referencing web-archived content preserved in, thus keeping the referenced information accessible to Wikipedia users. archived the pages referenced in Portuguese Wikipedia articles

Wikipedia articles refer to external pages with important complementary information that has since become unavailable.
Wikipedia recommends citing web archives (archiveurl/archive-url parameter).

The Portuguese Wikipedia contains about 1 million articles and on average 140 pages are edited per day. automatically extracted 14 million links from references in all Portuguese Wikipedia articles. Only 620 referenced and 744 553 the Internet Archive (5.3%). Note that Wikipedia’s guide to creating references recommends publishing citations to web archives ( archiveurl/archive-url parameter) .

On February 15, 2023, collected all pages referenced in Portuguese Wikipedia articles, which resulted in a new collection named EAWP42: Collection of external links from wikipedia using the wikimedia dumps, which contains 12 million files (856 GB).

The main result of this project was the creation of a new automatic process for extracting and collecting external links cited on Portuguese Wikipedia pages. Therefore, will perform an annual crawl of Wikipedia citations.

Attempt to automatically fix broken links in Wikipedia articles

InternetArchiveBot offers powerful operation and monitoring tools (eg Dashboard and Insights)
InternetArchiveBot offers powerful operation and monitoring tools (e.g. Dashboard and Insights)

There are software robots which automatically add links to web-archived content when they find broken links in Wikipedia articles (e.g. PywikibotWayback Medic or InternetArchiveBot).

An experiment was carried out to create an ArquivoPTBot based on the InternetArchiveBot because it offers powerful operation and monitoring tools (e.g. Dashboard and Insights ) and it is maintained by the Internet Archive: the largest web archive in the world.

However, it was not possible to launch this service in production because it implies changes in the software to use as a source of web-archived information.

If you want to collaborate to resume this project, please contact us!

Preserving Wikipedia references is at your fingertips! remains committed in contributing to preserve links cited in Wikipedia articles and offers the following services that may be useful to you. CitationSaver: preserves citations to online content ( CitationSaver: preserves citations to online content (

CitationSaver allows you to submit the source code of an Wikipedia article and will automatically extract the referenced links and archive the correspondent content. SavePageNow: saves pages in ( SavePageNow: saves pages in (

SavePageNow allows you to immediately archive a web page in, for example, that is being referenced in a Wikipedia article so that it doesn’t get lost.


Wikimedia Portugal, in collaboration with, promoted a set of webinars to capture the community’s attention for the preservation of content published and cited on Wikipedia. The videos and slides of these webinars are available:

Meet the winners of the Award 2023!


Last updated on June 14th, 2024 at 02:50 pm

The winners of the Award 2023 were announced by the Público newspaper, the official communication partner of this edition, on 26 June.

40 applications were received.

The award ceremony tooke place during the closing session of the Encontro Ciência (Portuguese Science Summit), on July 7, at Aveiro University.

1st place – “Viajar no tempo sobre carris”

The winner of the 10 000 euro prize was the work “Viajar no tempo sobre carris” (Travelling through time on rails) developed by Antero Pires, Carlos Cipriano, Diogo Ferreira Nunes and Ruben Martins.

Viajar no tempo sobre carris” is an online platform that analyses and presents the evolution of train travel times in Portugal, based on timetables preserved in

For example, it allows you to see the duration of the journey Lisbon-Oporto on the Alfa Pendular since the year 2000.

2nd place – “Representatividade das mulheres artistas na imprensa nacional”

The 2nd prize of 3 000 euros was awarded to the work “Representatividade das mulheres artistas na imprensa nacional” (Representativeness of women artists in the national press), by Cláudia Sevivas and Miguel Boavida.

This work resulted in the website Existo that provides information on Portuguese artists, referring to the web pages in which they were mentioned over time. The work is based on an analysis of their representation and visibility that allows several readings.

For example, we can find information about the artist Joana Vasconcelos, news about other artists in a certain year or even get a graphic visualization of women artists compared to men.

3rd place – “Memória Política

The 3rd prize of 2 000 euros was awarded to the work “Memória Política”, (Political Memory) developed by Miguel Lopes, Maria Carneiro and João Andrade.

“Memória Política” is a Web application that processes and presents information taken from the web pages of political parties represented in the Portuguese Parliament, archived by

For example, it allows you to search for the term “democracy” and obtain pages from the websites of the Parties related to the search. The results can be grouped by Party and by year.

Honorable Mention granted by Público newspaper

The Público newspaper, official partner of the 6th edition of the Prize, awarded an Honourable Mention to the work “Fábrica do Jornal” (Newspaper factory), carried out by Miguel Almeida.

“Fábrica do Jornal” is a Web application that allows the user to generate a personalized newspaper from the news preserved at The user can obtain a version that can be printed or saved in digital format.

Honorable Mention granted by AMCC – Aveiro Media Competence Center

The Aveiro Media Competence Center (AMCC), awarded its Honourable Mention to the work “Imaginarium”, carried out by Diogo Sousa.

Imaginarium” is a web application that searches for images based on similarities with other images.

For example, after suggesting an image of a car, “Imaginarium” searches for images in that have some affinity with the suggested image.

Flash interview – AMCC Executive Director

Award cerimony

The awards ceremony took place at the closing session of the Science 2023 Meeting, at the University of Aveiro, on 7 July 2023.

The awards were presented by the Minister of Science, Technology and Higher Education, Elvira Fortunato, the President of the FCT Board of Directors, Madalena Alves and the Executive Director of the Aveiro Media Competence Centre, João Moraes Palmeiro.

Image gallery

Cerimónia de Entrega Prémio 2023

Cerimónia de Entrega Prémio 2023
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Flash enterviews

Video of the cerimony

Dissemination materials


Short link to this page: presentations at IIPC GA/WAC, RESAW 2023 and CLEOPATRA

Last updated on March 10th, 2024 at 05:23 pm

Meeting the Web Archive Community

The International Internet Preservation Consortium (IIPC), a consortium that brings together Web preservation initiatives from around the world, held its General Assembly with its members on May 10, 2023.

On the following days, May 11 and 12, the IIPC Web Archiving Conference (IIPC WAC) was held, an initiative open to the community, where people or entities not associated with the IIPC and interested in the Web preservation domain can participate.

The two events were jointly hosted by KB – National Library of the Netherlands, and by Beeld & Geluid – Netherlands Institute for Sound & Vision.

Contributions from the at the Web Archiving Conference participated in the IIPC working group meetings (Training Working Group and Curators Working Group) and contributed with presentations in the thematic sessions Collaborations & Outreach and Program infrastructure (sessions 7 and 17).

  • updates 2023 (slides)
  • Linking web archiving with arts and humanities: the collaboration between ROSSIO and (video, slides)
  • behind the curtains (slides)

Meeting the RESAW research community

RESAW (Research Infrastructure for the Study of Archived Web Materials) is an initiative created in 2012 with the aim of promoting studies based on archived Web content, in areas such as Social Sciences, Digital Arts and Humanities.

The RESAW 2023 conference was held at the MUCEM Lab (Mediterranean Institute of Heritage Crafts) in Marseille on June 5-6, 2023, under the theme Exploring the Archived Web During a Highly Transformative Age.

Contributions from to RESAW 2023 contributed with presentations to the sessions Web Archive in Mediterranean area and its merge (4.A), From online Tools to Web Archive (6.B.), Towards a participatory approach to collections (9. A.), Digging up the materials for writing web history (9.B.).

  • How to research governmental web data? (abstract, slides)
  • Archiving Cryptocurrencies (abstract, slides)
  • Time to explore, time to learn from the archived web: training initiative (abstract, slides)
  • Exhibiting Web Memories from a call for community participation (abstract, slides)

CLEOPATRA Project Meeting

The CLEOPATRA Project, led by the L3S Research Center at the Gottfried Wilhelm Leibniz University of Hannover, has developed since 2019 a training programme for doctoral researchers (Early Stage Researcher, PhD). has participated in three courses: Incentives design for hybrid multilingual information processing and analytics, in Southampton; National and transnational media coverage of European parliamentary elections, 2004-2014, London; and NLP for under-resourced languages, in Zagreb, Croatia.

In 2022, the welcomed two researchers in its facilities who used the archived resources and received special support from the team to develop their research.

The CLEOPATRA Project ended in 2023 with a meeting on the 16th May, in Hannover, which brought together Professors, Researchers and representatives of the institutions involved.

Daniel Gomes,’s Manager, highlighted the new tools that makes available and the results of the work carried out by the researchers that have passed through at Jornadas de Computação Científica 2023. Register now!

thumbnail jornadas FCCN 2023

Last updated on October 24th, 2023 at 04:03 pm

Jornadas de Computação Científica 2023 was held at the Naval School in Almada from 27 to 29 June 2023.

This event is a meeting for sharing knowledge among the entities that make up the national higher education and research community.

The event counts with the participation of decision-makers of the institutions, people in charge of computer technical services and people responsible for libraries and documentation services, among others. presented two 90-minute sessions, on June 28th from 2h30 p.m. to 6 p.m., under the theme “ services for managing citations and cybersecurity” and the service Memorial in the Zapping session.


June 28 2:30-16 p.m.: available services and system architecture

Sessão 2 4:30-6 p.m.: uma ferramenta para gerir citações e cibersegurança Memorial


Jornadas de Computação Científica Registration page Científica 2023