In 1701 the dual state formed the Kingdom of Prussia, as Frederick III, Elector of Brandenburg crowned himself as king Frederick I in Prussia.
Berlin became the capital of the new Kingdom, replacing Königsberg.
This protest was not successful and the citizenry lost many of its political and economic privileges.
After the royal palace was finished in 1451, it gradually came into use.
Spandau is first mentioned in 1197 and Köpenick in 1209, although these areas did not join Berlin until 1920.