Are you looking for open-access databases to conduct your own research? This section is dedicated to a collection of sources of institutional and academic nature to allow you to search for raw data and/or publications exploting them. All of them are either EU-based or they also include EU-related research. 

Institutional 

• SearchEuropa.eu: Look for multiple PDF, Word, PPT files across 100 million europa.eu webpages 
• EU Treaties Dabatase: repository of all EU treaties  
• Chronological EU Treaties Database
• Online EU Budget: repository of documents on EU budgets 
• EU Open Data Portal: Multi-thematic studies based on quantitative studies 
• EU Publications: Publication Office of the European Union
• EC Library: Catalogue of the EC library 
• Eur-Lex: Information on EU legislative process 
• ESO Database: free-access database and info about any matter relaing to Europe 
• Eurostat: Mostly multi-thematic statistical data 
• Eurobarometer: EU Survey Data 
• ESI Funds Data: European Structural and Investment Funds Data 
• European Central Bank : Statistics
• Council of Europe : Statistics 
• PE Think-Tank: thematic studies
• Archive of European Integration: electronic repository by University of Pittsburgh 
• Spain-European Union Digital Archive: documents in all formats about Spain and the EU 
• European Court of Human Rights: Database of ECHR (Court Cases) 
• European Court of Justice: Database of ECJ (Court Cases) 
• Voting Results (EU Council): Search engine for voting results of EU Council  
• EP Plenary Database: database of parliamentary questions and union acts 
• Transparency Register: Database for EU-involved Interest Groups 
• Competition decisions: Database of EU competition cases
• Principal European Economic Indicadors (PEEIs): statistics aimed at economic, labour market contexts and price developments 
• AMECO: Macro-economic database of DG Economic and Financial Affairs from the Commission 
• Economic databases of the Commission: selection of surveys, databases and indicators 
• European Social Survey: transnational survey since 2001
• European Union Labour Force Survey (EU LFGS): Microdata from Eurostat
• Ipex: Database of mutual exchange of info between national parliaments and the EP 

• Infringement decisions: Database of EU legislation infringement decisions

• EU Directory Whoiswho: Discover each position, affiliate and employed member of staff in EU institutions 

Academic & Others 

• Online EU Publications: UAB EDC Review of academic articles published during a set period of time across the most important journals. All articles are from EU Studies/affiliated to EU topics
• ICPSR: Inter-university Consortium for Political and Social Research
• DART-Europe: Database of European Research Theses 
• Vox EU - CEPR Policy Portal 
• Database for Institutional Comparison in Europe (DICE)
• Harvard Dataverse 
• Figshare 
• Statista: Database of statistics (business-oriented)
• LIS Cross-National Data Center in Luxembourg 
• Gender Quotas Database