Ludwig Ritter von Köchel since undergone revisions. Mozart's works are often referred to by their K-numbers ("cf." opus number); for example, the "Jupiter" symphony, "Symphony No. 41" K. 551. Moreover, Köchel arranged Mozart's works into twenty-four categories, which were used by Breitkopf & Härtel when they published the first complete edition of Mozart's works from 1877 to 1910, a venture partly funded by Köchel. He also catalogued the works of Johann Fux. Ludwig Ritter von Köchel Ludwig Alois Friedrich Ritter von Köchel (; 14 January 1800 – 3 June 1877) was an Austrian musicologist, writer, composer, botanist and publisher. He is best known for
K. S. Lewkowicz K. S. Lewkowicz Karl Samuel Lewkowicz is a musical composer and lyricist from London. Lewkowicz lives and works in London, where he has a close ongoing working relationship with the Arcola Theatre in London's off West End, the theatre where most of his writing has been developed and produced. Most recently with playwright Amy Rosenthal he wrote the music and lyrics for The Queen and I – a musical about Queen Victoria and her relationship with her Muslim servant. The first reading of The Queen and I took place in August 2015 at Arcola theatre as part of their Grimeborn