Imposing marble structure a stone's throw from the Roman Forum and down the way from the Colosseum. Opposite in the Piazza is the building & balcony where Mussolini use to speak to the people.
I spent a summer in Rome studying art/architecture and we called this the "typewriter building." It's hard to see why from this angle. You chose a nice perspective for this shot.
I absolutely love this building!!! It's called Il Vittoriano. That's short for Monumento Nazionale a Vittorio Emanuele II. It was made to honour Victor Emmanuel, the first king once Italy became unified. Also, it holds the Tomb of the Unknown Soldier.
I loved seeing this building every day we were in Rome. Unfortunately, we never stopped to check it out and take photos. I'm glad you had the chance.