The Sedlec Ossuary is a Roman Catholic chapel, located beneath the Cemetery Church of All Saints, part of the former Sedlec Abbey in Sedlec, a suburb of Kutná Hora in the Czech Republic. The ossuary is estimated to contain the skeletons of between 40,000 and 70,000 people, whose bones have, in many cases, been artistically arranged to form decorations and furnishings for the chapel.