Rione XXI San Saba on Tavola 21, with the Baths of Caracalla and a sports ground above the small settlement around Santa Saba.
Source: Old map, public domain
Cross-hatching fills the large southern area behind the Aurelian Wall, while the Baths of Caracalla, the Vigna Antoniniana and a track lettered Campo Sportivo are set among green. The F.A.O. building appears near the top left and Piazzale Numa Pompilio at the right.