Serse was created in 1738.

The aria 'Ombra mai fu' from Handel's 'Serse' is sung by Xerxes I of Persia, also known as Xerxes the Great, King of Persia.

There is no specific collective noun for rain, in which case a noun suitable for the circumstances is used, for example a sprinkle of rain, a shower of rain, a downpour of rain, etc.

I'm taking it you mean the famous aria 'Ombra mai fù'. It is sung by the main character 'Serse' or 'Xerxes'. At the premier the part was sung by the castrato Gaetano Majorano - stage name of Caffarelli [12th April 1710 to 31st January 1783].

Marcello Paolini has: Played Lello in "Primo amore" in 1959. Performed in "Le cameriere" in 1959. Played Tonino in "I piaceri dello scapolo" in 1960. Played Serse Colasanto in "Akiko" in 1961. Performed in "Gli attendenti" in 1961. Played Menon in "Quattro notti con Alba" in 1962.