Rome is a lovely town for visiting – but it’s always interesting to see how over-tourism has changed things over the years. I remember going to Rome and having pretty much free reign to walk around the whole Colosseum. It looks like now you need to reserve your slot far in advanced through a new CoopCulture website that lets you buy tickets in advance. In fact, it’s the ONLY way to get tickets for the Roman Forum, Palatine Hill, Colosseum, and several other key cultural sites. There is no longer on-site ticket sales.
It also appears that the much vaunted Scavi tours under St Peter’s also have online information now as well, but it appears they still prefer a phone call or fax.