Barletta Castle was initially erected in the 10th century by the Normans as a typical motte and bailey structure. During the Crusade period, it was a used as a hostel for soldiers leaving for the Holy Land. It was upgraded and enlarged substantially under the reign of Frederick II between 1225 and 1228. This corresponds to the period in which he launched a crusade from here, the Sixth Crusade.
The castle was later expanded under the House of Anjou, when Barletta became an important centre of Aragonese-Spanish control in the area, in 1527. Charles had the building expanded again and the four massive bastions added to create the present fortress form. In 1915 the fortress, then in use as a barracks and military store, was bombarded by the Austro-Hungarian scout cruiser SMS Helgoland. In September 1943 it was the setting of an Italian military defence unit against a German army.
To enter the castle you cross a stone bridge leading to the entrance. Through the doorway, then, you have access to different areas, such as the square courtyard, the ancient seat of the guard and the chapel in which the castle were buried. From the courtyard, you can hop on to various scales, with which you can reach the top floor or the stands.
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.