Beside the Piazza Venezia, a steep staircase leads up to the austere 13th-century Santa Maria in Aracoeli, while another, more graceful and gradual, takes you up between the statues of Castor and Pollux to Michelangelo's beautifully proportioned square of the Campidoglio (Capitoline Hill).
There are some beautiful pieces besides the Piazza Venezia.
Capitoline Hill is weirdly situated and proportioned.