In the Austro-Prussian War of 1866, Nassau took Austria's side. This decision led to the end of the duchy. After the Austrian defeat, Nassau was annexed by Prussia and became part of the Prussian province of Hesse-Nassau. The deposed duke Adolph of Nassau in 1890 became the Grand Duke of Luxembourg (see House of Nassau). This turned out to be a fortunate change for the city, as it then became an international spa town. A rise in construction commenced after the aristocracy followed the lead of the Hohenzollern emperors, who began annual trips to Wiesbaden.
In the Austro-Prussian War of 1866, Nassau took Austria's side. This decision led to the end of the duchy. After the Austrian defeat, Nassau was annexed by Prussia and became part of the Prussian province of Hesse-Nassau. The deposed duke Adolph of Nassau in 1890 became the Grand Duke of Luxembourg (see House of Nassau). This turned out to be a fortunate change for the city, as it then became an international spa town. A rise in construction commenced after the aristocracy followed the lead of the Hohenzollern emperors, who began annual trips to Wiesbaden