Bernalda Castle was probably built originally by the Normans in the 11th century and restored by the Aragonese during their domination, when it was enlarged, fortified and protected with a moat and a drawbridge. The current castle was built by Bernardino de Bernardo, secretary of King Alfonso II, around 1470.
Today Bernalda castle presents a quadrangular plan with angular towers, with a markedly late-fifteenth century mark, although it can be considered as the result of different architectural stratifications. The observation of one of the cylindrical towers, which is equipped with a high trunk-conical base, could in fact suggest an Angevin building intervention. In any case, the castle's closing walls seem to follow the nature of the terrain, and are mainly perpendicular. The continuous restorations must have reduced the width of the entire structure, which at the time of reconstruction could be configured with at least four other towers. Those residuals are however made up of a basement, used mostly as storage, followed by a ground floor with defensive preparations also oriented towards the inside of the enclosure, and two upper floors open on the courtyard, except for the tower of the southern summit .
The castle of Bernalda has fourteen wells, to draw water in case of siege.
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.