Bone houses, also known as ossuaries, are structures designed to store human bones. They often arise from the need to manage space in cemeteries, especially in areas where burial space is limited. In some cultures, bones are exhumed from graves after a certain period and placed in these houses, allowing for the respectful storage of remains. These structures can be found in various parts of the world, with notable examples like the Catacombs of Paris and the Sedlec Ossuary in the Czech Republic. Bone houses serve both practical and cultural purposes, reflecting the beliefs and traditions surrounding death and remembrance.