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:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.