"Polish Digital Scores is part of a larger project entitled Polish Music Heritage in Open Access run by the Fryderyk Chopin Institute, which seeks to provide access to “the most important and representative works of Polish music from the 16th to 19th centuries.”12 Between August 2019 and July 2022, the project generated high-resolution images of over 25,000 musical sources, making them available for download as JPEG, TIFF and PDF files. It also created or updated the records of nearly 34,000 Polish musical sources in the Répertoire International des Sources Musicales(RISM) database (rism.info).This represents a dramatic expansion and improvement of Polish representation in RISM, as almost one-third of the nearly 98,000 Polish records in the database have been added or edited by this project. Such a collaboration of digitization units and cataloguers would be impressive in any three-year span, but it is even more so considering the limited access that project workers had to musical sources during COVID-19 lockdowns." (Reviewed by Timothy Duguid)