Horn (instrument) the "trombon da caccia" called for by Vivaldi in his opera "Orlando finto pazzo" (1714), and his Concerto in F for violin, two "trombon da caccia", two oboes, and bassoon, RV574, was also a hooped horn. In the eighteenth century some outstanding concertos were written for solo horn and orchestra by Telemann, Christoph Förster, Michael and Joseph Haydn, Leopold and Wolfgang Amadeus Mozart, and Carl Stamitz. Concerti grossi include concertos for two horns by Vivaldi and Bach’s First Brandenburg Concerto. At the end of the century Beethoven composed a Sonata for Horn and Piano in F major, Op. 17, for
Brandenburg with Poland. Brandenburg originated in the Northern March in the 900s AD from areas conquered from the Wends, and later became the Margraviate of Brandenburg, a major principality of the Holy Roman Empire, with Albert the Bear as prince-elector. In the 17th century Brandenburg came under the rule of the House of Hohenzollern, the rulers of Prussia, who established Brandenburg-Prussia to become the core of the Kingdom of Prussia. Brandenburg became the Province of Brandenburg in 1815, a province within the kingdom and later within the Free State of Prussia. Brandenburg was established as a state in 1945 after World