The fourth volume of the Catalogus fragmentorum cum notis musicis medii aevi in Slovacia edition, which aims at making the oldest sources of music culture from the Slovak area more accessible, features the oldest music culture sources from the city of Trnava. 27 medieval manuscripts originate from different types of liturgical books (antiphonaries, graduals, missals and sequentiaries) dating from the 14. to 16. century.