In 1815, an American Protestant minister, Thomas Hopkins Gallaudet, travelled to Europe to research teaching of the deaf. He was rebuffed by both the Braidwood schools who refused to teach him their methods. Gallaudet then travelled to Paris and learned the educational methods of the French Royal Institution for the Deaf, a combination of Old French Sign Language and the signs developed by Abbé de l’Épée. As a consequence American Sign Language today has a 60% similarity to modern French Sign Language and is almost unintelligible to users of British Sign Language.