Saarlouis (German pronunciation:[zaːɐ̯ˈlʊɪ]; French:Sarrelouis, French pronunciation:[saʁlwi]) is a city in the Saarland, Germany, capital of the district of Saarlouis. In 2006, the town had a population of 38,327. Saarlouis, as the name implies, is located at the River Saar.
It was built as a fortress in 1680 and named after Louis XIV of France.