Piaristická kolej, Former Piarist college building in Kosmonosy, Czech Republic

Piaristická kolej is a four-wing civic building with a courtyard surrounded by arcades located next to the Church of the Exaltation of the Holy Cross in Kosmonosy. The structure displays classical proportions with open colonnades running along the central inner courtyard.

Count Heřman Černín of Chudenice called the Piarists to Kosmonos in 1688 to run a Latin school; teaching began on 28 August 1688 in a temporary residence. The college building, designed by B. Maderna and built by F. Ceresola in 1688–1694, became a full five-class gymnasium. In 1784 the Piarists moved with the school to Mladá Boleslav, and in 1791 F. Leitenberger set up a textile manufactory in the former college.

The college had its own theatre hall and a garden with several gazebos. Until 1769 students staged regular plays and declamations with dances, choirs and musicians, attended by a large public; some plays were written and directed by the students themselves.

The building currently operates as a psychiatric hospital and is not open for public visits. Visitors can observe the exterior architecture and its setting next to the church from the outside.

The college's theatre hall hosted regular plays, declamations, dances and choir performances until 1769, when a new school code banned them; school academies that replaced them were forbidden in 1776. Some plays were written and directed by the students themselves.