Johann Rudolf Czernin von und zu Chudenitz

Johann Rudolf Graf Czernin von und zu Chudenitz (born or baptized on 9 June 1757 in Vienna; died or buried on 23 April 1845 in Vienna) was a k. u. k. Austrian civil servant and theater director. He descended from the old Bohemian noble family Czernin von und zu Chudenitz. He was the son of Count Prokop Adalbert Czernin, who offered Mozart in 1776 a one year's rent, provided he would write some compositions for the Count's orchestra. His sister was Countess Antonie Lützow. And perhaps most important his deceased mother was the sister of Archbishop Colloredo, thus the Count was a nephew of the Salzburg Archbishop.

Czernin went to school in Salzburg, where his uncle, Count Hieronymus von Colloredo was the bishop. The young Czernin and certainly his sister were in connection with Wolfgang Amadeus Mozart (and almost the same age), who wrote a violin and piano concerto for them. Countess Lützow, 25 years old, was a fine pianist and Mozart composed a piano concerto (KV. 246) for her in 1776. Count Johann Rudolph Czernin was an aspiring violinist. In 1778 he founded an orchestra, which played on Sunday afternoons at the Lodron family .Leopold Mozart sent Wolfgang, then in Paris, an amusing account of its first meeting, at which both Leopold and Mozart’s sister Nannerl played. Leopold wrote of Czernin's limited achievements as and indefatigable violin player.

In 1781 Czernin married Theresa Schoenborn and traveled with her to Italy, Switzerland, France, Belgium, Holland, and England, and became interested in the new fashion of the English landscape garden. At the end of the 18th century, Czernin made the hunting lodge Jemčina very famous. In the presence of representatives of the Bohemian and Austrian aristocracy famous Cursorial hunting parties were held here, and scholars and scientists from the Bohemian National Patriotic Movement were invited as guests.

...
Wikipedia