Capital and Ionic column profile from Theatro di Marcello (aka Palazzo Orsini), built by Octavian Augustus in 714, with a capacity of 30,000 spectators, from MONUMENTI DI FABBRICHE ANTICHE ESTRATTI DAI DISEGNI, 1803, by Giovanni Battista Cipriani.
You are all set!
Your first Culture Weekly will arrive this week.