'The Indian Emperor' is an English Restoration era stage play written by -

The Indian Emperour, or the Conquest of Mexico by the Spaniards, being the Sequel of The Indian Queen is an English Restoration era stage play, a heroic drama written by John Dryden that was first performed in the Spring of 1665.
The play has been considered a defining work in the subgenre of heroic drama, in which "rhymed heroic tragedy comes into full being.

Source: Amazon.com