Arlon (French pronunciation: ​[aʁlɔ̃]; Luxembourgish: Arel; Dutch: Aarlen, pronounced [ˈaːrlə(n)]; German: Arel; Walloon: Årlon) is a Walloon municipality of Belgium located in and capital of the province of Luxembourg. With a population of just over 28,000, it is the smallest provincial capital in Belgium.The municipality consists of the following sub-municipalities: Arlon proper, Autelbas-Barnich, Bonnert, Guirsch, Heinsch, and Toernich. Other population centers include: