Gaeta Castle stands on a rocky promontory in Gaeta on the coast of the Gulf of Gaeta, 120 km from Rome. Gaeta has played an important role in the military history of Italy: foundation of the city and the construction of its first fortifications date back to the ancient Rome and in the 15th century, the city fortifications were greatly expanded and strengthened. In its long history, the castle, which spreads over an area of ​​14 thousand square meters, and more than once was rebuilt and modified.

The exact date of construction of the Castello di Gaeta is unknown, but according to some historians, it could be built in the 6th century during gothic war or later, in the 7th century, to protect the city from the invasion of the Lombards, who in those years, periodically flooded seaside territory of Lazio and Campania. The first documented mention of it found in 1233, the year when Emperor Frederick II of the Hohenstaufen dynasty ordered to reinforce the structure. He stopped several times in the castle.

Castello di Gaeta current consists of two different buildings. His Angevin part at the bottom of the castle and dates back to the reign of the Angevin dynasty. Aragon is a part is at the top - it was built by Emperor Charles V, along with other fortifications. The construction of these fortifications, by the way, Gaeta made one of the most fortified cities of central Italy.

Until recently Anjou of the Castello di Gaeta served as a military prison, and today it belongs to the municipality of the city and is used for various exhibitions and conferences. Under the dome of its highest tower is the Royal Chapel, built in 1849 by order of Ferdinand II. The Aragon is now part of the School of Navigation.