The Acropolis of Mystras is a medieval fortress located in the Peloponnese region of Greece. It was established in the 13th century by the Franks and later became a significant center of the Byzantine Empire. The site features impressive ruins, including churches, palaces, and fortifications, showcasing a blend of architectural styles. Today, the Acropolis is part of the UNESCO World Heritage Site and attracts visitors for its historical significance and stunning views of the surrounding landscape. The site reflects the rich cultural heritage of Byzantine civilization and offers insights into the region's history during the Middle Ages.