L'Arche is an international federation of non-profit organisations working to create networks of community where people with and without intellectual disabilities live and work together. Founded in 1964 by Jean Vanier, Raphaël Simi, and Philip Seux, L'Arche emerged as a reaction and community-based alternative to the ill-treatment and dismal living conditions in the psychiatric institutions of the 1960s.

Jean Vanier was a Canadian Catholic philosopher and theologian. In 1964, he founded L'Arche, an international federation of communities spread over 37 countries for people with developmental disabilities and those who assist them. In 1971, he co-founded Faith and Light with Marie-Hélène Mathieu, which also works for people with developmental disabilities, their families, and friends in over 80 countries. He continued to live as a member of the original L'Arche community in Trosly-Breuil, France, until his death.