Karolinum (formerly Latin: Collegium Carolinum, in Czech Karlova kolej) is a complex of buildings located in the Old Town of Prague.

Rotlev's son Martin (who financed the second oldest German translation of Bible) was closely linked with the court and supported the reformist tendencies of the university.

[2] In addition to the Rotlev Palace, King Wenceslaus also bought the surrounding buildings and rebuilt them for the purposes of the school.

The decision was apparently influenced by renewed romantic and patriotic enthusiasm, (regarding the historical building as a significant monument for education in Bohemia).

Following the World War I and the establishment of the Czechoslovak state, the buildings of Karolinum remained a property of the Charles University.