Post of Castile, Birgu

This eastern defensive stronghold was a crucial part of Birgu's fortifications, originally constructed in 1553. Its name pays homage to the Langue of Castille, a division of the Spanish Knights Hospitaller who were responsible for its initial construction. The Post of Castile gained its enduring fame during the Great Siege of 1565. The fort came under heavy attack from Ottoman forces situated on Santa Margherita Heights, Kalkara, and Turkish trenches, as well as from the north entrance to the ditch. The Ottoman assaults were fierce, and at one point, a cannon breach occurred, creating a gap in the Post of Castile's defenses. Ottoman soldiers rushed through the breach, threatening the city's safety.

However, a swift counter-attack led by brave defenders, with Grand Master Jean de La Valette at the forefront, managed to repel the invaders and save the city from falling into enemy hands. Despite their success, Grand Master La Valette was wounded during the battle and had to be sent to the Sacra Infermeria for treatment. In commemoration of this critical event, the area where the breach occurred was given the name "il-prexxa."

The Post of Castile is surrounded by a hornwork, effectively separating it from the rest of the fort and ensuring its strategic isolation during an attack. A defensive ditch surrounds the fortification, providing an additional layer of protection. To shield the knights and soldiers from shrapnel and enemy fire, caponiers were constructed atop the structure.

Inside the fort, a tunnel leads to the defensive ditch, allowing for swift movement and communication during a siege. Additionally, the fort features storage facilities for ammunition, ensuring a steady supply for the defenders during times of conflict.

During World War II, the tunnel and storage areas of the Post of Castile served a different purpose—they became an air-raid shelter for the citizens of Birgu.