Hohenzollern Castle is the ancestral seat of the imperial House of Hohenzollern.The third of three castles on the site, it is located atop Berg Hohenzollern, a 234 m bluff rising above the towns of Hechingen and Bisingen in the foothills of the Swabian Alps of central Baden-Württemberg, Germany. The first fortress on the mountain was constructed in the early 11th century.
Germany is so wonderfully abundant with castles, and yet I have seen only a few so far. On the stamp is another one, Marksburg, one of the principal sites of the UNESCO World Heritage Rhine Gorge. Danke sehr Diana ;)