Mystras developed on a steep hill overlooking Sparta after William II of Villehardouin, the Frankish prince of Achaea, built a fortress there in 1249. Following his capture by Byzantine forces, he surrendered the castle in 1262. Settlement expanded below it as residents moved from the exposed plain to the protected slopes. Houses, walls, gates, churches, monasteries, and palaces descended in terraces, creating the amphitheater-like city later praised as the Wonder of the Morea.

The town became the main center of Byzantine authority in the Peloponnese and, from 1348, the seat of the Despotate of the Morea. Members of the imperial Palaiologos family governed from the palace complex. Patrons founded and decorated churches including the Metropolis of Hagios Demetrios, Hagioi Theodoroi, the Hodegetria, Hagia Sophia, Peribleptos, Evangelistria, and Pantanassa. Their architecture combined regional forms with ideas from Constantinople, while fresco cycles represent the refinement and experimentation of the late Byzantine Palaeologan Renaissance.

Mystras was also an intellectual center. The philosopher Georgios Gemistos Plethon taught there and renewed study of Plato, while his pupil Bessarion later carried Greek learning into Italian humanist circles. The city’s influence should not be reduced to a simple bridge to the Renaissance, but its scholars participated in wider exchanges across the late medieval Mediterranean. Churches, libraries, courts, and monasteries supported a culture that persisted even as the Byzantine Empire contracted under military and economic pressure.

Ottoman forces captured Mystras in 1460. Venetian rule briefly replaced Ottoman control from 1687 to 1715, after which the Ottomans returned. Warfare, revolt, and changing trade damaged the town, including destruction during the Orlov uprising in 1770 and the Greek War of Independence. After the modern town of Sparta was founded in 1834, residents gradually left the hillside. Pantanassa remained an active convent, but much of Mystras became a ruin of roofless houses, broken walls, and partially preserved religious buildings.

Excavation and restoration have stabilized monuments, conserved frescoes, and clarified streets and terraces. Some roofs, walls, and palace elements reflect modern reconstruction, while vegetation and steep terrain continue to affect the remains. UNESCO inscribed Mystras in 1989. Its value lies in the unusually complete relationship among fortress, palace, neighborhoods, water systems, monasteries, and churches. Rather than a single Byzantine moment, the site records Frankish foundation, Byzantine florescence, Ottoman and Venetian occupation, abandonment, and modern creation of an archaeological landscape whose surviving paths still reveal the organization of a late medieval city today.