同慶帝
Đồng Khánh (, , lit. "collective celebration"; 19 February 1864 – 28 January 1889), born Nguyễn Phúc Ưng Kỷ (阮福膺祺) or Nguyễn Phúc Ưng Đường (阮福膺禟), also known as Chánh Mông (正蒙), was the ninth emperor of the Nguyễn Dynasty of Vietnam. He reigned three years between 1885 and 1889. His royal temple name was Cảnh Tông (景宗).