The Wikipedia article of the day for August 23, 2016 is Handel's lost Hamburg operas.
Of the four operas written by the youthful composer George Frideric Handel (pictured) between 1703 and 1706 when he lived and worked in Hamburg, only the first, Almira, has survived complete. The music for the others is lost apart from a few orchestral fragments. Handel learned the rudiments of opera composition while employed as a violinist at the Oper am Gänsemarkt, Hamburg's famous opera house, and was able to get Almira and a second opera, Nero, performed there during the temporary absence of the theatre's director, Reinhard Keiser. Almira was successful, Nero less so. Handel's last two Hamburg operas, Florindo and Daphne, were not produced at the Gänsemarkt before Handel left Hamburg. No music that can be definitively traced to Nero has been identified, although scholars have speculated that some of it may have been used in later works, particularly Agrippina, which has a similar plot and characters. Fragments of music from Florindo and Daphne have been preserved, although without the vocal parts, and some of these elements have been incorporated into an orchestral suite first recorded in 2012.