Duomo di Firenze formally known as the Cattedrale di Santa Maria del Fiore multi-colored marble/limestone 1296 Gothic style / design by Arnolfo di Cambio / structurally completed 1436 with dome by Filippo Brunelleschi (Renaissance architecture) https://en.wikipedia.org/wiki/Florence_Cathedralhttps://en.wikipedia.org/wiki/Filippo_Brunelleschi