Baths of Caracalla
The enclosure of the bath complex took up 13 hectares (32 acres) of the district, about the same size as the Baths of Caracalla. The main entrance was to the northeast. To the southwest was a large exedra (now still visible as the outline of Piazza della Repubblica). The "exedra" was flanked by two large buildings, likely libraries. These in turn connected to circular halls: one of them is now the church of San Bernardo, the other is visible at the start of Via del Viminale. The central block of the baths was 280 (910 feet) by 160 meters (520 feet) or 10.85 acres (compared to the 6 acres of the Baths of Caracalla).