The Copertino Castle is located in the eponymous city of Copertino, north of Gallipoli on the heel of Apulia.
Like the castle of Otranto, Copertino was built for the defence of the peninsular of the Salento. The castle was originally built in the Norman period, and altered significantly for Alfonso Castriota by Charles V's renowned fortifications expert Evangelista Menga in 1540, in response to significant military developments including the use of gunpowder. The alterations included a ditch and majestic bastions with 90 arrow slits to allow cannon movements. Copertino therefore incorporates an Angevin keep, being later enlarged to a quadrangle plan with a tapered rampart at each of the four corners. The entrance portal is in Catalan-Durazzesque style, conceived as a triumphal arch, with the entrance to the family chapel of St Mark to the right of the entrance vestibule. The chapel itself is decorated with 15th Century frescoes by the mannerist painter Gianserio Strafella.
The Castle's inner courtyard includes several enormous galleries, and to the left of the Castle's entrance is the porticoed palace built for the Squarciafico Pinelli, Counts of Copertino and Marquesses of Galatone, ancestors of the Princes of Belmonte. Copertino Castle is one of the largest fortresses constructed in Apulia.
It is held in local folklore that Isabella of Clermont, daughter of Tristan de Clermont and Catherine of Taranto, who later became Queen of Naples, was born at Copertino Castle.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.