Dolmen-Chapel of São Brissos — Wikipedia

The Dolmen-Chapel of São Brissos (Portuguese: Anta-Capela de São Brissos) is a small chapel located in the parish of Santiago do Escoural in the municipality of Montemor-o-Novo in Portugal. It consists of the conversion of a prehistoric tomb into a Christian building. The dolmen was decreed a National Monument in 1910, while the dolmen-chapel was classified as a Property of Public Interest in 1957.