In 1589, Maréchal de Villars supervised the construction of a small fort on the hill known as 'colline des Moulins' overlooking Saint-Tropez. This fort was destroyed in 1595, but the military engineer Raymond de Bonnefons chose the same site to build further defensive structures from the start of the 17th century.
The hexagonal tower, which formed an essential part of the village's defence system, was erected between 1602 and 1607. The Citadel underwent numerous modifications over the centuries, before falling into disuse in the 19th century, when the strategic interest of this perfectly-preserved fortress finally diminished.
The old cannons are still in place facing out towards to sea, and the views from the top are stunning across the Gulf and the Mediterranean Sea.
Bought up by the town in 1993 and made a listed monument, today it hosts a museum dedicated to the history of Saint Tropez and its relationship with the sea.
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.