sentences:  As Heinrich von Bünau left no issue, Dahlen passed to his widow Johanna Louise Augusta Gräfin von Einsiedel (1805-1871), the widow of Friedrich Freiherr von Friesen who died in 1871.After Heinrich von Bünau's death, Johanna married her third husband, Karl Heinrich August Sahrer von Sahr (1821-1874).The couple also left no issue.