Image by Marc Brulard Five Hundred Pixels
Entry to the dome is to the far right of the basilica's main portico, where you also buy your ticket. A small lift can take you halfway up, but it’s still a long climb to the top (320 steps to be exact). Press on and you’re rewarded with some stunning views over Rome's rooftops. It’s well worth the effort, but bear in mind that it’s a long climb and not recommended for anyone who suffers from claustrophobia or vertigo.