Agreed upon by the sons of Louis the Pious
Those in attendance at the signing included Archbishop Liutbert, Bishop Altfrid, Count Ingleram, and Count Liutfried.  Agreed upon by the sons of Louis the Pious, The land from the North Sea to Central Italy and the title of Holy Roman Emperor went to Lothair.  His brother Louis the German got Germany, and Charles the Bald got France, permanently cleaving the empire forged by their grandfather Charlemagne.  FTP, name this 843 treaty that divided the Carolingian empire.
Those in attendance at the signing included Archbishop Liutbert, Bishop Altfrid, Count Ingleram, and Count Liutfried.  
Treaty of Verdun