Mystras Castle, Medieval castle in Greece

Mystras Castle is a fortress and settlement built on a hill west of Sparta in Greece and surrounded by protective stone walls. The site consists of an upper section with the castle at the summit and a lower section containing churches, monasteries, and residential structures made of local stone and clay, distributed along steep pathways.

The castle was founded in 1249 by William II of Vilehardouin, a Frankish prince, as a fortress to control the region. After its capture by the Byzantines in 1262, the city became the capital of the Despotate of Morea and housed important rulers and scholars until its surrender to the Ottoman Empire in 1460.

The name Mystras derives from Myzithras, a local cheese production center that gave the place its name. Residents organized their lives around monasteries and churches, which continue to display 14th-century frescoes that reveal the religious character that shaped the city.

The site is accessible through two main entrances, one in the Upper City and one in the Lower City, both near parking areas. An admission ticket is required, and comfortable shoes are strongly recommended due to uneven ground and steep climbs; bring water, especially during hot months.

The castle's south and southeast sides rest on a sheer cliff, which made attack from those directions difficult; on the other sides, extra walls and fortifications reinforced the defence. Inside the walls stood a courtyard, barracks, a large water cistern and a small chapel. From the summit the whole Eurotas valley is visible to the east and the Taygetus mountains to the west.