Çemberlitaş Hammam is a working Ottoman bathhouse a few streets off the Divan Yolu, and it has been heating the same marble since 1584. You undress in a tall domed hall, then step into the hot room, where a ring of marble columns surrounds a broad heated slab called the göbektaşı and daylight leaks in through the pierced dome. You lie on the warm stone, are scrubbed and lathered, then rinsed from marble basins along the walls.
Sinan built the bath for Nurbanu Sultan, wife of one sultan and mother of the next, who endowed its steam and water to fund her charities. It went up as a çifte hamam, twin baths for men and women running in parallel under separate domes. When the Divan Yolu road was widened in the nineteenth century part of the women's wing was shaved away, so the two halves no longer mirror each other. The name comes from the hooped Roman column standing outside. The sounds are water, low voices and the slap of a foamed cloth.