Loggia dei Lanzi in Florence

You're standing at the Loggia dei Lanzi, on the corner of the Piazza della Signoria in Florence. Start with those three huge arches. They're tall, wide and round. When this building went up, between 1376 and 1382, pointed Gothic arches were still all the rage. So these round ones look back to classical antiquity and ahead to the Renaissance. Florentines loved them so much that Michelangelo suggested carrying them all the way around the square.