Neutral Moresnet

Neutral Moresnet (French pronunciation: [mɔʁɛsnɛt], [mɔʁɛsnɛ], German pronunciation: [ˈmɔʁəsnɛt], [ˌmɔʁəsˈnɛt]) was a small Belgian–Prussian condominium in western Europe that existed from 1816 to 1920 and was administered jointly by the United Kingdom of the Netherlands, Belgium (after its independence in 1830) and the Kingdom of Prussia. It was 1.5km wide and 2.5km long, with an area of 3.5 square kilometres. After 1830, the territory's northernmost border point at Vaalserberg connected it to a quadripoint shared additionally with the Dutch Province of Limburg, the Prussian Rhine Province, and the Belgian Liège Province. That border point's position is currently represented by the Three-Country Point, the meeting place of the borders of Belgium, Germany, and the Netherlands.

During the First World War, Neutral Moresnet was annexed by Germany. The armistice between France and Germany in November 1918 forced Germany to withdraw from Belgium and Neutral Moresnet. A year later, the Treaty of Versailles awarded Neutral Moresnet to Belgium, so from January 1920 it became the municipality of Kelmis.

During the Second World War, Kelmis and the surrounding area were annexed by Germany, and its name was changed to Moresnet. The territory was returned to Belgium at the end of the war.