translate English to German: After the death of king Lothar II the kingdom of Lotharingia , and with it Metz, was contested and changed back and forth between the Eastern and the Western Frankish kingdom until in 925 it finally became part of the East kingdom and subsequently the Holy Roman Empire .
Metz wurde im 17. Jahrhundert durch Vauban befestigt und diente als Drehscheibe für alle Feldzüge Ludwigs XIV. in seiner Reunionspolitik gen Osten.