If you visit Siena you will likely want to stop by Siena Cathedral (Duomo di Siena). It is designed in black and white, the colors of Siena which symbolically link the Cathedral back to the black and white horses of the city’s founders, Senius and Aschius. And after touring the Cathedral it is an easy walk to the Battistero di San Giovanni (The Baptistery of Saint John) located at the base of the Cathedral. It has an unassuming entryway that can easily be overlooked but it is well worth the  visit. The Baptistry was built between 1316 and 1325 by Camaino di Crescentino. Like most of Europe’s cathedrals it is visually stunning. The interior is full of colorful frescoes, decorative columns, and remarkable sculptures that seem to cover every inch of space. It is an incredible experience that can easily overwhelm your senses.