In the winter of 1307/08, the peninsula and the city were seized and held by the Catalan Company during their move from Thrace to southern Greece. The 14th-century historian Nikephoros Gregoras describes Kassandreia as "abandoned" during his time, and sometime before 1407, Emperor John VII Palaiologos rebuilt the old fortifications of Justinian. As a "de facto" annex of Thessalonica, the peninsula shared the city's fate and came under a brief Venetian control in 1423, before being captured by the Ottoman Empire in ca. 1430. Kassandra () was one of the places that rebelled against the Ottomans in 1821. Because it managed to stop the Turkish army from fighting the south Greece rebels it was burnt from edge to edge. The refugees moved with fishing boats to the islands of Skiathos, Skopelos, Alonissos and Evoia. Nobody lived in the peninsula for more than 30 years. Then the population started to gather again. In 1912 it became a part of Greece. The peninsula was lined with paved road in the mid-20th century. Tourism also arrived after the war period of World War II and the Greek Civil War. More paved roads were added in the 1970s and the 1980s and tourism developed rapidly. Agriculture shifted to tourism and other businesses as the primary industry of the peninsula in the 1980s. On August 22, 2006, the peninsula was struck by a major forest fire that affected the central and the southern parts of the peninsula, on the day of the heatwave when temperatures soared to nearly 40 °C. Several houses were destroyed including villas and hotels, and one campground disappeared, while the natural beauty was erased. It burnt large areas of forests including some farmlands. The cause of this tremendous fire was dry lightning which occurred throughout the evening. The forest fire lasted nearly five days and devastated the economy and the peninsula. Villages that were affected were Chanioti, Nea Skioni, Polychrono, Pefkochori, Kriopigi and Kassandrino. The forests began to recover by 2015. Cassandreia is twinned with the following cities: