Mystras ( Greece ) was Byzantine city of the Peloponnese. located 6 km northwest of Sparta. Today it is in ruins, although some buildings have been restored such as palaces, and is a valuable source for knowledge of history, art and culture of the last two centuries of Byzantium. The story of "the dead city " starts from the mid-13th century, when completed the conquest of the region by the Franks. In 1249, William II Villardouinos built the castle on the east side of Mount Taygetos, on top of a hill with a steep and conical form.