Meuse (river) - Deutschlandlied

The Meuse (Maas) is mentioned in the (nowadays not sung) first stanza of the Deutschlandlied German national anthem. The lyrics written in 1841 describe a then–disunited Germany with the river as its western boundary, where King William I of the Netherlands had joined the German Confederation with his Duchy of Limburg in 1839. Though the duchy's territory officially became an integral part of the Netherlands by the 1867 Treaty of London, the text passage remained unchanged when the Deutschlandlied was declared the national anthem of the Weimar Republic in 1922.