Fortress Angelokastro or "Angel Castle", is one of the most important architectural monuments of the Byzantine period in Greece. It is located on the highest peak of the coastline of Corfu in the north-western part, near Paleokastritsa. An impregnable fortress, which is a well-fortified Acropolis, was one of the most important strategic Byzantine fortifications of Corfu and has played an important role in the life of the island for centuries. In peacetime, it was also a center of trade.

Powerful fortification was built in the early 13th century during the despot of Epirus. Most likely, the founder Angelokastro was Michael I Komnenos Ducas (the founder of the kingdom of Epirus), hereinafter referred to as the Angel Michael, though perhaps it was his son Michael II Komnenos Ducas.

In 1267 the fortress was captured by Angevins. The manuscript, which it acknowledges is the oldest written sources on the history of Angelokastro. In 1386 the castle became the property of the Venetian Republic, which was at that time a mighty sea power, and was used to control the sea routes in the southern part of the Adriatic and the Ionian Sea. In 1403 Genoese pirates tried to capture the castle, but were repulsed. Fortress successfully withstood the siege and the Turks in 1571. It was one of many attempts to capture the Ottoman Empire, the island of Corfu, which they have not surrendered.

Today the fortress is open to visitors, but is still under reconstruction and archaeological work. Until our times there remained a small church dedicated to the Archangel Michael, and the chapel of St. Kyriaki, where the frescoes of the 18th century. From the top of the fortress offers stunning panoramic views.