Heroic drama is a type of play popular during the Restoration era in England, distinguished by both its verse structure and its subject matter. The sub-genre of heroic drama evolved through several works of the middle to later 1660s; John Dryden’s The Indian Emperor (1665) and Roger Boyle’s The Black Prince (1667) were key developments.
Encyclopaedia Britannica Entry on the heroic play.
Infoplease Brief entry on heroic drama.
Oxford Index Quick reference to Heroic Drama, outlining the main characteristics of the form.
Wikipedia Entry on heroic drama and key dramatists.