Printer, bookbinder, and bookseller Janez Mandelc (also Janez Mandelc, Hans Mannel or Joannes Manlius) came to Ljubljana in the spring of 1575 at Jurij Dalmatin and Jurij Khisl's invitation. As soon as he obtained the permission to set up a printing press by the States, he issued Johann Salicetus's speech against the Turks, while in the autumn of 1575, he also published Dalmatin’s translation of Jesus Sirah. Because of the tense religious and political situation, Archduke Karl banned printing in Ljubljana in 1851. Amidst the preparations for printing Dalmatin's translation of the Bible, Mandelc was banished from Carniola. He left the Duchy in the spring of 1582, and continued his activity in several towns in western Hungary, Burgenland, and Croatia. Although his press operated only for a short time, it was crucial for the introduction of the black art in the Slovenian territory. 28 Mandelc's Ljubljana prints are known today.

A selection of Manlius's prints that are kept at the National and University Library's collections and were suitable for digitization, as well as one copy from the Danish Royal Library is presented in the collection.