Rione XVI Ludovisi on Tavola 16, a sloping crescent of regular blocks inside the Aurelian Wall, crossed diagonally by Via Ludovisi.
Source: Old map, public domain
Streets named after Italian regions, such as Lombardia, Liguria, Sardegna and Sicilia, are lettered across the grid. A Lutheran church, an Anglican church and the Teatro delle Arti appear in the northern blocks, while Santa Maria della Concezione sits near the bottom.