Brussels Fortress is a historic military structure located in Brussels, the capital of Belgium. Originally built in the 11th century, it served as a defensive stronghold for the city. Over the centuries, the fortress underwent several modifications and expansions, reflecting the changing military needs and architectural styles of the time. The fortress played a significant role in various conflicts, including the Franco-Dutch War and the Austrian Succession. Today, remnants of the fortress can still be seen, showcasing its historical importance and offering insights into the military history of Brussels and Belgium.