SESAC, originally the "Society of European Stage Authors and Composers" is a performing rights organization (P.R.O.) in the United States. Since the organization stopped using its full name in 1940, it is now known exclusively as SESAC. SESAC was founded in 1930, making it the second-oldest, and also the fastest-growingTemplate:When? P.R.O. in the United States. Based in Nashville, Tennessee, SESAC deals with all aspects of the business, from creation to licensing and administration.