Serse tragedy and comedy or high and low class characters. The musicologist Charles Burney later took "Serse" to task for violating decorum in this way, writing: "I have not been able to discover the author of the words of this drama: but it is one of the worst Handel ever set to Music: for besides feeble writing, there is a mixture of tragic-comedy and buffoonery in it, which Apostolo Zeno and Metastasio had banished from serious opera." Another unusual aspect of "Serse" is the number of short, one-part arias, when a typical opera seria of Handel's time was almost wholly made
Opera in German music, "Singspiele" were no match for contemporary opera serias in artistic sophistication. A milestone of German opera was Anton Schweitzer's "Alceste", with a libretto by Wieland, premiered in 1773 in Weimar. At the end of the 18th century a composer who would change all this would emerge: Wolfgang Amadeus Mozart. As music moved into the Classical era in the late 18th century, most German-born composers still avoided writing opera in their own language. The great figure of the early Classical period was Christoph Willibald von Gluck but his pioneering reforms were directed at Italian and French opera, not the German