2 mentions in A few hours in Siena - what to do?
alessandro d. said, "...down on all of Siena? Head to the Piazza del Duomoand buy yourself a pass to visit the inside of the Siena Cathedral, the baptistery, the Museum of Metropolitan Institution from where you can enjoy another view of Siena, and the..." See More
John S. said, "...The Siena Cathedral is well worth a look. Walk over to the Piazza del Campo and visit the Palazzo Pubblico (V. Anche Museo Civico). If you are really industrious, you can climb to the top of the Tower of Mangia. Then get..." See More
Exploring the Beautiful Medieval City of Siena – Gallop Around The Globe