Glyndebourne (/ˈɡlaɪndbɔːn/) is an English country house, the site of an opera house that, since 1934, has been the venue for the annual Glyndebourne Festival Opera. Initially, operas were presented within the house but there is now a free-standing opera house on its grounds. The house itself, located near Lewes in East Sussex, England, is thought to be about six hundred years old.