If you are going just on sheer scale alone, Italy’s Supreme Court is one of the most impressive buildings in Rome. It’s absolutely huge. However opinions on the building are divided. It’s a mixed bag of Renaissance and Baroque architecture, and completely covered in travertine limestone with OTT decoration. Its extravagance, its over-sized dimensions and ostentatious decoration caused locals to nickname it Palazzaccio (the Bad Palace).
The Palazzo was built between 1888 and 1910 following the proclamation of Rome as the capital of a newly unified Italy.
The best way to get the full effect is to approach using the bridge, Ponte Umberto I. As you cross the Tiber Rover, it will hit you in the face.
Perhaps the best feature is the large bronze quadriga chariot sitting at the very top of the building. The four bronze horses are rearing up, with their front legs in mid-air and the winged figure of Justice stands in the chariot.
For most people the Supreme Court probably just a quick stop if near Castel Saint Angelo or on the way to the Vatican. However I’d recommend taking a couple more minutes and going around the back to Piazza Cavour, a nice grassy piazza where you can also see the building’s back facade and a monument to Camillo Cavour, Italy’s first Prime Minister.