Answer:
Opera seria
Step-by-step explanation:
Opera seria is a style of Italian opera predominated in Europe from 1710s ,dominated in the 18th century typically based on a classical subject that was either contain heroic,chronicled the triumphs and tragedies of historical or mythological monarchs and deities.
Opera seria is also know as serious opera or dramma per musica were italian in nature and was a big hit in other countries in Europe especially London in the United Kingdom, all it big stars were castratos.
example are Demofoonte (1764), by Niccolò Jommelli,Rinaldo (1711), by George Frideric Handel etc