What is the term for a place in a Roman shrine dedicated to ritual cleansing?

The correct term for a place in a Roman shrine dedicated to ritual cleansing is 'Lavatorium.' This term specifically refers to a washroom or a place designated for washing, which is essential for rituals that required individuals to be in a state of purity. In the context of Roman religion, maintaining ritual purity was vital before participating in ceremonies or approaching the sacred spaces within shrines.

The other options do not accurately represent this space: 'Purgatorium' suggests a place of purification but is broader and not specifically tied to Roman practices of cleansing rituals. 'Tempulum' refers to the physical structure or enclosure where the gods could be worshipped, while 'Sanctum' denotes a sacred or holy space but does not inherently relate to the act of cleansing. Thus, 'Lavatorium' is the most precise and relevant term for a location dedicated to ritual cleansing in a Roman shrine.