505. She stoops to conquer

Apologies to Oliver Goldsmith for borrowing the name of his play.
An old queen of Denmark named Jane,
In her reign suffered serfs with no pain.
When they'd visit their liege
She'd use noblesse oblige,
Which gave us the phrase "The Great Deign."

O.G. also wrote a famous novel and poem circa 1770.  Can you name them?