Ostuni is the most typical example of Apulian town architecture with its wihitewashed houses, the narrow streets and the pink-brown colour of its main monuments. The so-called "Old Town" is Ostuni's citadel build on the top of a hill and still fortified with the ancient walls. Ostuni is reputed an architectural jewel, and is commonly referred to as "the White Town" ("La Città Bianca", in Italian) for its white walls and its typically white-painted architecture. http://www.ostunithewhitecity.com/mainpages/thecity.htm