The Cathedral Library experienced a significant development at the time of the archiepiscopacy of György Lippay (1642-1666) and György Szelepcsényi (1666-1685). By purchasing the stock of the Fuggers comprising 1681 volumes, Lippay intentionally developed his library, and this was further enlarged by the purchases of Szelepcsényi. The library of Nagyszombat is enriched by several archiepiscopal and canonical heritages; by this the stock comprised almost 3000 volumes in the 1670s. At this time was the first alphabetical and thematic catalogue known prepared by the archbishop.