Building by Spanish Steps
I thought this was the house where Keats expired, but I think the house is actually on the OTHER side of the steps (on the right as you face them from below).
Michelangelo's dome, viewed from the roof
St. Peter's, Vatican. Designed by Michelangelo, who worked on the construction of the basilica beginning in 1547. When he died, Giacomo Della Porta, Michelangelo’s pupil, took over the direction of the work, completing it in 1590.