In this new open-access publication, Tomaž Erjavec and colleagues present the ParlaMint corpora, which include the transcriptions of sessions of seventeen European national parliaments. The content of parliamentary debates has become increasingly important for research in the social sciences and humanities, and the ParlaMint corpora open up the possibility for transnational analysis on societally relevant topics. The paper outlines the corpora’s compilation, quantitative data, encoding and distribution. ParlaMint corpora have been used in several studies, including in the 2021 Helsinki Digital Humanities Hackathon, where a team focused on the identification of differences and similarities in parliamentary debates around the COVID-19 pandemic in Italy, Poland, Slovenia and Great Britain. The corpora are openly available through CLARIN.SI.