Tolong jelaskan mengenai Galeri gambar dari Siena dalam bahasa melayu

A Medieval Italian  Commune: Siena under the Nine, 1287–1355  by Professor William M. Bowsky (1982)

McIntyre,  Anthony Osler. Medieval  Tuscany and Umbria (1992) ISBN 0-670-83525-0

Siena virtual tour (Italian Landmarks)

The Mysticism of Catherine of Siena

Siena information for the independent traveler

The Baptistery of Saint John

Tapak Warisan Dunia di Itali