Roman bathhouses originated from Greek bathing traditions in the 5th century BC. They became popular public spaces for Romans to bathe communally and socialize starting in the 3rd century BC. Aqueducts were often built to supply water to bathhouses, which typically included rooms for changing, bathing in hot, warm, and cold pools, and toilets. Additional amenities could include sweat rooms, gymnasiums, libraries, and gardens. The Roman baths in Bath, England are unique due to their sacred hot spring supplying over a million liters of 46°C water daily.