An ossuary is a container or structure used to hold the bones of deceased individuals. These sites are often created when burial space is limited, allowing for the efficient use of land. Ossuaries can be found in various cultures and are sometimes located near churches or cemeteries. Historically, ossuaries have been used in many places, including the famous Catacombs of Paris and the Sedlec Ossuary in the Czech Republic. They serve as a way to honor the dead while also addressing practical concerns about space and burial practices.