Charlottenburg is a locality of Berlin within the borough of Charlottenburg-Wilmersdorf, named after Queen Sophia Charlotte (1668-1705). It is best known for Charlottenburg Palace, the largest surviving royal palace in Berlin, and the adjacent museums. harlottenburg was an independent city to the west of Berlin until 1920 it was incorporated into "Groß-Berlin" (Greater Berlin) and transformed into a borough. In the course of Berlin's 2001 administrative reform it was merged with the former borough of Wilmersdorf becoming a part of a new borough called Charlottenburg-Wilmersdorf.