Prison in Mladá Boleslav, Correctional facility in Mladá Boleslav, Czech Republic.

The Prison in Mladá Boleslav was an institutional building with sturdy construction and multiple wings arranged systematically for security purposes. The facility contained cell blocks, administrative areas, and separate sections designed for different categories of inmates.

The prison and the adjoining District Court were built in 1928 as one judicial complex designed by architect and urban planner František Janda for the Regional Court. From 1948 to 1949 the building housed the headquarters of the Mladá Boleslav State Security unit, with one floor reserved for prominent political prisoners; in the early 1950s the regime concentrated convicted clergy there. The prison, with a capacity of 240 inmates, was closed in 1955.

The building's name comes from its use as a prison, though it was built as part of a justice complex with the District Court. Its cells later became a film set: scenes for Kajínek, Lidice and Mission: Impossible – Ghost Protocol were shot here, and the court received a computer from the Kajínek crew.

The building was connected to the nearby District Court, highlighting its location within the justice center area. After closure, the structure was no longer used for its original purpose and eventually vacated.

The building's last owner, ARENA MB, sold it in 2022 to the developer Swietelsky Real Estate, which plans to demolish it for a residential complex of 220 flats designed by the firm Casua. Filming had continued until then: the crew of Kajínek donated a computer to the adjoining district court for the use of its chairman's office.