Prince Henry of Prussia (1862–1929) became the club's patron. Henry was interested in motor cars as well and supposedly invented a windshield wiper and, according to other sources, the car horn. In his honor, the "Prinz-Heinrich-Fahrt" (Prince Heinrich Tour) was established in 1908, like the earlier Kaiserpreis a precursor to the German Grand Prix. Henry and his brother William gave patronage to the Kaiserlicher Automobilclub (Imperial Automobile Club). Henry also was an early proponent of introducing submarines and airplanes. He had merchant ships converted into seaplane tenders for operations in the Baltic Sea. Henry respected his brother, but this attitude was not returned in the
Prince Franz Wilhelm of Prussia in a civil marriage at Dinard on 4 September 1976 and religiously on 22 September 1976 in Madrid. Before his marriage he converted to the Russian Orthodox faith and was created a Grand Duke of Russia with the name Mikhail Pavlovich by his father-in-law Grand Duke Vladimir of Russia. Prince Franz Wilhelm and Grand Duchess Maria had one son before divorcing in 1985, at which point he reverted to his previous title. Prince Franz Wilhelm of Prussia Prince Franz Wilhelm of Prussia ("Franz Wilhelm Victor Christoph Stephan"; born 3 September 1943) is a German businessman and member of the House