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).
Capitoline Hill is weirdly situated and proportioned.