What Year Was Sign Language Created and a Brief History Please?

The written history of sign language began in the 17th century in Spain. In 1620, Juan Pablo Bonet published Reducción de las letras y arte para enseñar a hablar a los mudos (‘Reduction of letters and art for teaching mute people to speak’) in Madrid. It is considered the first modern treatise of Phonetics and Logopedia, setting out a method of oral education for the deaf people by means of the use of manual signs, in form of a manual alphabet to improve the communication of the dumb or deaf people.
From the language of signs of Bonet, Charles-Michel de l'Épée published his alphabet in the 18th century, which has arrived basically unchanged until the present time.