The Capela dos Ossos (or in English: Bone Chapel) is one of the best known monuments in Evora, Portugal. It is located next to the entrance of the Church of St. Francis.

It was built in the 16th century by a Franciscan monk who, in the Counter-Reformation spirit of that era, wanted to prod his fellow brothers into contemplation and transmit the message of life being transitory. This is clearly shown in the famous warning at the entrance “Nós ossos que aqui estamos pelos vossos esperamos” or in English: “We bones that are here, for your bones we wait”.

The lugubrious chapel is formed by three spans 18.7 meters long and 11 meters wide. Light enters through three small openings on the left. Its walls and eight pillars are "decorated" in carefully arranged bones and skulls held together by cement. The ceiling is made of white painted brick and are painted with death motifs. The number of skeletons of monks was calculated to be about 5000, coming from the overflowing cemeteries that were situated inside several dozen churches. Some of these skulls have been disrespectfully been scribbled upon with graffiti.