The Uprising of Peter Delyan (Bulgarian: Въстанието на Петър Делян, Greek: Επανάσταση του Πέτρου Δελεάνου), which took place in 1040–1041, was a major Bulgarian rebellion against the Byzantine Empire in the Theme of Bulgaria. It was the largest and best-organised attempt to restore the former Bulgarian Empire until the rebellion of Ivan Asen I and Petar IV in 1185.