From the Wikipedia page 
Saarbrücken (German pronunciation: [zaːɐ̯ˈbʁʏkn̩], French: Sarrebruck [saʁbʁyk], Rhine Franconian: Saarbrigge [zaːˈbʁɪgə]) is the capital and largest city of the state of Saarland, Germany. Saarbrücken is Saarland's administrative, commercial and cultural centre and is next to the French border.
Saarbrücken was created in 1909 by the merger of three towns, Saarbrücken, St. Johann, and Malstatt-Burbach. It was the industrial and transport centre of the Saar coal basin. Products included iron and steel, sugar, beer, pottery, optical instruments, machinery, and construction materials.
In the 20th century, Saarbrücken was twice separated from Germany: in 1920–35 as capital of the Territory of the Saar Basin and in 1947–56 as capital of the Saar Protectorate.