Hohenzollern - This is the ancestral seat of the imperial House of Hohenzollern.[n 1] The third of three castles on the site, it is located atop Berg Hohenzollern, a 234-metre (768 ft) bluff rising above the towns of Hechingen and Bisingen in the foothills of the Swabian Alps of central Baden-W├╝rttemberg, Germany.