Rudolf F. (F.) Franz — Russian artist and painter of German origin, the artist's father Rudolf Frentz. He was born in 1831 in Berlin, in 1854 he graduated from the Berlin Academy of arts. In 1857 he moved to St. Petersburg, where he painted portraits to order. Among his works — portraits of Grand Dukes Nikolay Nikolaevich and Vladimir Alexandrovich, the other members of the Russian Imperial family. Was known as the artist-animal painter. In 1885 he was elected an honorary member of the Imperial Academy of arts. Died 24 Dec 1918.