Opus number developed other catalogue-number systems; among them the "Bach-Werke-Verzeichnis" (BWV-number), and the "Köchel-Verzeichnis" (K- and KV -numbers) with which are organised the works of Johann Sebastian Bach and Wolfgang Amadeus Mozart, respectively. In the classical period, the Latin word "opus" ("work", "labour") was used to identify, list, and catalogue a work of art. By the 15th and 16th centuries, the word "opus" was used by Italian composers to denote a specific musical composition, and by German composers for collections of music. In compositional practise, numbering musical works in chronological order dates from 17th century Italy, especially Venice. In common usage, the
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