Motorboat Race in Kiel Harbour during 'Kiel Week'. The inset portrait depicts Frederick William Victor Augustus Ernest (German: Friedrich Wilhelm Victor August Ernst) (1882?1951) of the House of Hohenzollern - the last Crown Prince of the Kingdom of Prussia and the German Empire. Son of Kaiser Wilhelm II. 1907 was the 25th anniversary of Kiel Week - whether The Crown Prince took part is unclear, but his Father had been an active supporter of the event since 1894.