Domenico Fontana
Immense sums were spent upon public works, in carrying through the comprehensive planning that had come to fruition during his retirement, bringing water to the waterless hills in the Acqua Felice, feeding twenty-seven new fountains; laying out new arteries in Rome, which connected the great basilicas, even setting his engineer-architect Domenico Fontana to replan the Colosseum as a silk-spinning factory housing its workers.