The Fort can be visited
Fort Saint-Elme

In Collioure, Occitanie region, France, stands Fort Saint-Elme. Built between 1538 and 1552 under Emperor Charles V, the complex is now a museum.
History+
The origins of Fort Saint-Elme date back to the 8th century, when a watchtower was erected on this site, likely during the Arab-Berber occupation. In the 13th century, the Kings of Majorca rebuilt the signal tower. King Peter IV of Aragon strengthened the defenses after conquering the coast in 1344. In the 15th century, under French rule, the complex was further fortified and named Saint-Elme. In the 16th century, the fort was expanded into a modern, star-shaped fortress under Charles V from 1538 to 1552. Despite this modernization, the fort fell to French troops under King Louis XIII in 1642. Vauban, Louis XIV's military architect, further strengthened the complex in 1659. During the French Revolution, the fort was the scene of battles and changed hands several times before being recaptured by General Dugommier in 1794 after a 22-day siege.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Hervé Rebours
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 42.5186, 3.0938