Corydon is the title of a collection of essays by André Gide about homosexuality, named after Virgil's character of that name.

Together, the essays use naturalists', historians', poets', and philosophers' evidence to back up Gide's argument that homosexuality pervaded the most culturally and artistically advanced civilizations (such as Periclean Greece, Renaissance Italy and Elizabethan England) and that this was reflected by writers and artists from Homer and Virgil to Titian and Shakespeare in their depictions of male-male relationships (such as Achilles and Patroclus) as homosexual (rather than platonic or friendship-based as other critics argue they were). All this, Gide writes, strongly suggests that homosexuality is more fundamental and natural than heterosexuality, the latter being merely a union constructed by society.

"My friends insist that this little book is of the kind which will do me the greatest harm," Gide wrote of the book.

André Paul Guillaume Gide (November 22, 1869—February 19, 1951) was a French author and winner of the Nobel Prize in literature in 1947. Gide's career ranged from its beginnings in the symbolist movement, to the advent of anticolonialism between the two World Wars.

Known for his fiction as well as his autobiographical works, Gide exposes to public view the conflict and eventual reconciliation between the two sides of his personality, split apart by a strait-laced education and a narrow social moralism. Gide's work can be seen as an investigation of freedom and empowerment in the face of moralistic and puritan constraints, and gravitates around his continuous effort to achieve intellectual honesty. His self-exploratory texts reflect his search of how to be fully oneself, even to the point of owning one's sexual nature, without at the same time betraying one's values. His political activity is informed by the same ethos, as suggested by his repudiation of communism after his 1936 voyage to the USSR.