Human remains hidden in the church of St. Peter and Paul.
The Mělník Ossuary was built in the church of St. Peter and Paul and is one of the largest in the Czech Republic, along with the ossuary in Kutná Hora. The bones, which are arranged here, are the remains of 10,000-15,000 victims of war events. The Ossuary was formerly an extension of the monastery cemetery and the church itself is one of the oldest temples in Bohemia.
The ossuary was built at times of plague epidemics, when the graveyard was soon filled, so the grave-diggers picked old graves and bones, and put them in the ossuary. The ossuary served for its purpose until 1775.