From Wikipedia: Same-Sex Unions in Pre-Modern Europe is a historical study written by American historian John Boswell and first published by Villard Books in 1994. Then a professor at Yale University, Boswell was a specialist on homosexuality in Christian Europe, having previously authored three books on the subject. Boswell's primary argument is that throughout much of Medieval Christian Europe, unions between figures of the same sex and gender were socially accepted. Outlining the problems with accurately translating Ancient Greek and Latin terms regarding love, relationships, and unions into English, he discusses the wider context of marriage and unions in the Classical world and early Christian Europe.