1) Kingdom of Bavaria 
[Bavaria] The Mainkreis was one of the 15 districts of the Kingdom of Bavaria between 1806 and 1837 (since 1817 as Obermainkreis). Its name meant in German the `District of the Main” because the Main River ran through it. It was the predecessor of the Regierungsbezirks Oberfranken (Administrative Regional District of Upper Franconia). ==I...