Interrogation room and secret apartments. Hybernská used to belong to the Aesthesians, today it is home to students
It is the oldest paved street in Prague, but also a historical window into the events of the 1950s. After the Second World War, the State Security occupied Hybernská Street near the Municipal House and set up wiretap apartments, observation rooms and offices there. Although the locations were top secret, artefacts have been found in the houses that house today’s Campus Hybernská that bring police practices closer to home.
Source https://aktualne.cz/vyslechove-mistnosti-tajne-byty-i-pozorovatelny-prazska-hybe/