
Geopolitical divisions according to the Treaty of Meerssen.
The 'Treaty of Meerssen' or 'Mersen' in
870 was an agreement of the division of the
Carolingian Empire by the surviving sons of
Louis I,
Charles II of the
West Franks and
Louis the German of
East Franks, signed at the town of
Meerssen, which is now in the
Netherlands.
Louis II, Holy Roman Emperor, with the support of
Pope Hadrian II sought a piece of the partition, but was denied. The treaty replaced the
Treaty of Verdun. The Kingdom of
Lotharingia was divided between Charles II and Louis the German, in
869, after the death of their nephew
Lothar II, King of
Lotharingia. The north of Lotharingia was in Danish Viking control and was only divided between West Francia and East Francia on paper.