Baldwin IV (1108 – 8 November 1171) was count of Hainaut from 1120 to his death.
Baldwin IV was the son of Count Baldwin III of Hainaut and Yolande de Wassenberg. Also known as Baldwin the Builder, he purchased the property of Ath in 1158 and built the Burbant tower. He ceded the locality of Braine-la-Willotte, also known as Braine-le-Comte, to the chapter of Sainte-Waudru in 1158. In 1159, he incorporated the seigniory of Chimay and in 1160 the châtellenies of Valencians and of Ostrevent.
Mons (French: [mɔ̃s] ; German and Dutch: Bergen, Dutch pronunciation: [ˈbɛrɣə(n)] ; Walloon and Picard: Mont) is a city and municipality of Wallonia, and the capital of the province of Hainaut, Belgium.
Mons was made into a fortified city by Count Baldwin IV of Hainaut in the 12th century. The population grew quickly, trade flourished, and several commercial buildings were erected near the Grand-Place. In 1814, King William I of the Netherlands increased the fortifications, following the fall of the First French Empire. The Industrial Revolution and coal mining made Mons a centre of heavy industry. In 1830, Belgium gained its independence and the decision was made to dismantle the fortifications, allowing the creation of large boulevards and other urban projects. In 1914, Mons was the location of the Battle of Mons. The British were forced to retreat by a numerically superior German force and the town remained occupied by the Germans until its liberation by the Canadian Corps during the final days of the war. There are several memorial placards related to the World War I battles.
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