The latter chose Birkenfeld as his residence and in 1595, through the Treaty of Kastellaun with his joint ruler the Margrave of Baden, Edward Fortunatus, secured exclusive rule in the districts of Birkenfeld and Allenbach (until 1671).
Viimane valis Birkenfeldi oma residentsiks ja aastal 1595, Kastellauni lepingu järgi oma kaasvalitseja, Badeni markkrahvi Eduard Fortunatiga, tagas ainuisikulise valitsemise Birkenfeldi ja Allenbachi ringkondades (aastani 1671).