A set of rooms contains relics, often called after one. The Chamber of the Holy Mantle actually is one of a set of rooms that once were private quarters. Together they hold what is well described in Sacred Relics (Topkapı Palace). Only one room is that of the mantle. For the whole one can come across the name Has Oda, but that name is also found for an adjacent room used for exhibitions (I took pictures of weapons there).