Jackson, Thomas Graham, Sir, 1835-1924 · Cambridge, University Press · leaf 273
nes, 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… … 190 ROME [cH. XIII s.Cos- It consists of a circular domed chamber (Fie. 40) tnnza , , \ .•-> t / 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…
