From frommers.com Side Trips | Bone Church in Sedlec From the outside, Kostnice looks like most other Gothic churches. But from the moment you enter the front door, you know that this is no ordinary church--all of the decorations are made from human bones. No kidding. Frantisek Rint, the church's interior decorator, created crosses of bone, columns of bone, chalices of bone, and even a coat of arms in bone for the Schwarzenberg family, who owned the church. The obvious questions are where did the bones come from and why were they used for decorations? The first question is easier to answer: The bones came from victims of the 14th-century plague and the 15th-century Hussite wars; both events left thousands of dead, who were buried in mass graves on the church's site. As the area developed, the bones were uncovered, and this was an idea the local monks came up with to put the bones to use.