The Siege of Valenciennes took place from November 1676 to March 1677, during the Franco-Dutch War. A French army besieged the city of Valenciennes, which was then a part of the Spanish Netherlands and defended by a small army of the Holy Roman Empire. The city surrendered to the French on 17 March. It was formally ceded to France the following year in the Treaty of Nijmegen, which ended the war.