Map of Schwarzburg in 1574, after the division of the Oberherrschaft.After the Treaty of Speyer (1570) Günther XLI and Albrecht VII jointly ruled the Oberherrschaft, the parts of the county that lay to the south of Erfurt. In 1574 the two brothers agreed to divide their lands. Günther XLI got Arnstadt, while Rudolstadt went to Albrecht VII.
Own work
Sir Iain