Jackson, Thomas Graham, Sir, 1835-1924 · Cambridge [Eng.] University press · leaf 305
s, but the whole seemsto have been largely re-built. A mile and more beyond the Porta Pia is a round s. Cos- tanza building now the church of S. Costanza, erected byConstantine as a mausoleum for his family, and especiallyhis daughter Constantia, whose huge porphyry sarco-phagus stood originally in… … 190 ROME [cH. XIII s. Cos- It consists of a circular domed chamber (Fig. 40) 35 feet in diameter, surrounded byan aisle, the total diameter within thewalls being ]^ feet. The centraldrum on which the dome rests con-tains a clerestory and is carried uplike those at Spalato and S. Vitale,so as to…
