This took us down to the Roman Forum. At this point, the sun really came out, and we wandered through the gardens between the ruins, basking in the sunshine.
The route through the Forum took us out just by the Colosseum.
You had to pay to go inside, and by this time it was not only hot but also fearsomely crowded, so we contented ourselves with peering in through the turnstiles and then walking round the outside.
We walked back up the Via dei Fori Imperiali towards the Wedding Cake ("Hey Fiance, look - do you remember that place? It's where you proposed to me!"). See what I mean about the scaffolding and plastic sheeting? It should look more like this.
By this time it was after 3 o'clock, and man cannot live on champagne alone, so we walked down to the Piazza Navona and had lunch there.
Sitting down made us realise how much walking we'd done and that we could do with a rest, so we headed back to the hotel. New Man's room had a complimentary bottle of champagne (well, fizzy wine) cooling in a bucket when we arrived on Friday, so when we got back on Saturday we took it up to the roof terrace and chilled out, toasting each other's health and happiness, looking at the photos of the day and reading up in the guide book about all the places we'd visited.
We did go out again in the evening, and walked along the Tiber towards the Vatican. The streets were really coming alive with both locals and tourists, and there was a street market running alongside the river.