Conversation so far:
who plays the contrasting sections in a ritornello
In the Concerto Grosso, a ritornello structure was used, in which a recurrent section, or ritornello, alternates with episodes, or contrasting sections, played by the soloists.
In what kind of music are the ritornellos played
A ritornello is a recurring passage in Baroque music
What is the meaning of Baroque
The word “baroque” comes from the Portuguese word barroco meaning misshapen pearl
In what period was Baroque music first composed
Baroque music was composed from approximately 1600 to 1750

Question: any famous composers
Self-contained rewrite: Are there any famous composers of Baroque music