“Frescoes in the ancient Roman city, one of Italy’s most popular attractions, fade under the blistering sun or are chipped at by souvenir hunters. Mosaics endure the brunt of tens of thousands of shuffling thongs and sneakers. Teetering columns and walls are propped up by wooden and steel scaffolding. Rusty padlocks deny access to recently restored houses, and custodians seem to be few and far between.”