Engi, Tenryaku no chi is the magnificent imperial reign name for the reigns of Emperor Daigo and Emperor Murakami in the mid Heian Period (the 10th century).
延喜・天暦の治（えんぎ・てんりゃくのち）とは、平安時代中期（10世紀）の醍醐天皇・村上天皇両天皇の治世を聖代視した呼称。