Edward Perry Warren (January 8, 1860 – December 28, 1928) was an American millionaire, art collector and the author of works proposing an idealized view of homosexual relationships.

He and Marshall lived together at Lewes House, a large residence in Lewes, East Sussex, where they became the center of a circle of like-minded men interested in art and antiquities who ate together in a dining room overlooked by Lucas Cranach's Adam and Eve—a gift of Harold W. Parsons[3]—now in the Courtauld Institute of Art.

[8] His published works include A Defence of Uranian Love in three volumes, which proposes a type of same-sex relationship similar to that prevalent in Classical Greece, in which an older man would act as guide and lover to a younger man.

In 1900 Warren published The Prince who did not Exist, a small edition art book from the Merrymount Press, "a most beautiful specimen of workmanship" according to the New York Times.

He managed the family trust established in May 1889 with the legal assistance of Louis D. Brandeis to benefit his father's widow and five children.

[10] The Warren Trust case became a point of contention during the 1916 Senate hearings on the confirmation of Brandeis to the Supreme Court, and it remains important for its explication of legal ethics and professional responsibility.

Warren’s notable friend and a frequent visitor in Lewes was the French sculptor Auguste Rodin.

Warren commissioned a larger than life-size version of “Le Baiser” (The Kiss) from Rodin “in the finest possible marble” for his own private collection.

The contract drawn up, specified Rodin’s fee of 20,000 francs, as well as the stipulation that “the genital organ of the man must be completed”.

[4] Warren’s Kiss study, generally regarded today as being the finest of the three examples, is now a national treasure and displayed in the Tate Gallery in London.

Warren told Lois Shaw, a relative and friend, "I think that I have found a boy to adopt, but shall not know till my return to England.

His ashes were buried in the non-Catholic cemetery in Bagni di Lucca, Italy, a town that is known as a spa in Etruscan and Roman times.

Travis Warren inherited $3,000 a year managed by his guardians (Thomas and Burdett) up to the age of twenty-eight.

[3] In 1935 a collection of Greek papyrus texts has been donated to Leiden University in The Netherlands, prompting the foundation of the Leids Papyrologisch Instituut.

[15] A photograph of Warren and Marshall together was used as the cover image of the 2012 nonfiction book Outlaw Marriages: The Hidden Histories of Fifteen Extraordinary Same-Sex Couples by Rodger Streitmatter in which they are the focus of one chapter.