sentences:  During the Mameluk period (13th-15th centuries), the "Cave of the Coffins" (Catacomb no.20) served as a place of refuge for Arab shepherds.Lieutenant C. R. Conder of the Palestine Exploration Fund visited the site in late 1872 and described one of the systems of caves, known as "The Cave of Hell" ("Mŭghâret el-Jehennum").