Erstein is a commune in the Bas-Rhin department, in the region of Grand Est, France. An important necropolis from the Merovingian era has b…Erstein is a commune in the Bas-Rhin department, in the region of Grand Est, France. An important necropolis from the Merovingian era has been excavated near Erstein in 1999–2000. Erstein was known in Alsace in the Middle Age for its canonesses monastery, founded in the 9th century and abandoned in 1422. The buildings were destroyed in the 16th and 19th centuries.