The faith leaders also sought for countries to seek justice on behalf of the victims.
The declaration was presented at the launch of the Global Interfaith Commission on LGBT+ Lives during a virtual conference hosted in the U.K. December 16.
Jayne Ozanne, director of the commission, called the declaration a landmark.
"We've never had such a powerful, clear, and supportive statement from so many leaders," she told CNN.
Nearly 400 religious leaders representing 10 religions from 35 countries signed on to the initial declaration that recognized religious institutions' history and role harming LGBTQ people.
Some of the prominent initial signatories included Nobel Peace Prize winner Archbishop Emeritus Desmond Tutu and his lesbian daughter the Reverend Canon Mpho Tutu van Furth of South Africa; former Irish president Mary McAleese; the Reverend John C. Dorhauer, the general minister and president of the United Church of Christ; the Reverend Michael-Ray Mathews, president of the Alliance of Baptists; and Rabbi Mel Gottlieb, president of the Academy for Jewish Religion in California.