Eglise Saint-Donat, Arlon
Ruisseau de Clairefontaine, Eisch, Alzette, Sauer, Moselle tributary at river kilometre 206
From a hill in the centre of the old town, the church, built in 1626, looks out over the 30,000 inhabitants. In the 11th century, Waleran, 1st Count of Arlon, built a castle there, which was destroyed in 1558. Capuchins soon built a church in its place, which was later fortified into a citadel in the style of Vauban. The history of the monastery came to an end at the end of the 18th century. The church remained.
The Roman settlement of Orolaunum was established as early as 52 BC and is considered one of the three oldest towns in present-day Belgium. Around 54 AD, the town marked the intersection of the Roman roads from Reims to Trier and from Tongern to Metz.
When it was first mentioned in a document in 870, the town was called Arlon, as it is today. The Semois, the longest tributary of the Meuse, rises in Arlon and surrounds it almost in a ring. Two streams rise on the eastern edge of the town: Ruisseau de Clairefontaine and Bech, which flow into the Eisch after just over 4 kilometres and with it into the Alzette. (Source: Wikipedia)