The Hohenzollerns are a dynasty of former princes, electors, kings and emperors of Hohenzollern, Brandenburg, Prussia, the German Empire and Romania, says Wikipedia. Charlottenburg Palace and its extensive garden were built for Queen Sophie Charlotte of the Hohenzollerns. Its oldest section dates to 1695. Frederick the Great updated it in the 1740s. It is the most important Hohenzollern residence left in Berlin.