** Battle of Placentia — Emperor Aurelian is defeated by the Alemanni forces invading Italy

** Emperor Ai of Jin, a Jin Dynasty ( 265-420 ) emperor

** Emperor Ai of Han ( 27 BC – 1 BC )

** Emperor Ai of Tang ( 892 – 908 )

** Liber ad honorem Augusti by Peter of Eboli, narrative of the conquest of Sicily by Henry VI, Holy Roman Emperor ( Latin )

** Imperial Prince Nunakura Futotama-Shiki ( Emperor Bidatsu ); born 538 ( second son )

** Imperial Prince Oe or Ikebe ( Emperor YOMEI ); born 540 ( fourth son )

** Imperial Princess Ohotomo or Ohomata ; born about 560 ; married to her nephew Prince Oshisako no Hikohito no Oe, son of Emperor Bidatsu

** Imperial Princess Toneri, born about 565 ; died 603 ; married to her nephew Prince Tame Toyora, son of Emperor Yomei

** Imperial Princess Hasetsukabe no Anahobe no Hashihito, born about 560 ; died 621 ; married ( A ) to her half brother Emperor Yomei ; married ( B ) to her nephew and stepson Prince Tame Toyora, son of Emperor Yomei

** Imperial Prince Hatsusebe ( Emperor SUSHUN )

** Prince Oshisako no Hikohito no Oe, born about 556, married ( A ) Princess Ohomata ( Ohotomo ), his aunt, daughter of Emperor Kimmei and Soga no Kitashi-Hime, by whom he had a son and a daughter ;( B ) Princess Nukate-Hime ( his half sister ), by whom he had 3 sons ; ( C ) Princess Woharida ( his half sister ), by whom he had a son and a daughter:

** Princess Uji no Shitsukahi ( Uji no Kahitako ), born about 570, married to Prince Shōtoku, son of Emperor Yōmei and Empress Anahobe

** Princess Tame, married to her nephew Emperor Jomei

** Second son: Imperial Prince Ohito ( 緒仁親王 ) ( Emperor Go-En ' yū )

** First son: Imperial Prince Motohito ( 幹仁親王 ) ( Emperor Go-Komatsu )

** Henry II, Holy Roman Emperor

** Der Tag wird kommen ( The day will come, Josephus and the Emperor ), 1942

** Emperor Constantine I

** The Treaty of Münster ( Instrumentum Pacis Monasteriensis, IPM ), concerning the Holy Roman Emperor and France and their respective allies.

** The Treaty of Osnabrück ( Instrumentum Pacis Osnabrugensis, IPO ), concerning the Holy Roman Emperor, the Empire and Sweden and their respective allies.

** Jean-Bédel Bokassa, president of the Central African Republic, crowns himself Emperor.

** Emperor Charles I of Austria gives up his absolute power but does not abdicate.

** WWII: Emperor Hirohito announces Japan's surrender on the radio.

** Column of Constantine

** Marcus, Gratian, Constantine " III " and Constans " II " in Gaul and Britain ;

** Constantine

** Helena of Constantinople, also known as " Feast of the Holy Great Sovereigns Constantine and Helen, Equal-to-the-Apostles.

** Constantine II becomes King of Greece, upon the death of his father King Paul.

** Constantine Mitsotakis, former Greek Prime Minister

** Constantine Andreou, Brazilian-Greek artist ( d. 2007 )

** Constantine Karamanlis, Greek politician ( b. 1907 )

** Constantine XI, last Byzantine Emperor (" Last Roman Emperor ")

** Colossus of Constantine, a giant bronze and marble statue of Constantine the Great

** Constantine VI of Armenia ( assassinated )

** Constantine II becomes Emperor of Vidin after his father's imprisonment.

** Constantine I of Imereti

** Dalmatius, Caesar and nephew of Constantine I ( executed )

** Hannibalianus, king of the Pontus and nephew of Constantine I ( executed )

** Love Street ( 1999, 3 issues, featuring John Constantine )

** His Majesty King Constantine ( used within the International Olympic Committee )

** Constantine Cavafy, Greek Alexandrine poet ( died 1933 )

** Princess Alexandra of Saxe-Altenburg ( 1830 – 1911 ), daughter of Joseph, Duke of Saxe-Altenburg ; wife of Grand Duke Constantine Nikolaevich of Russia as Grand Duchess Alexandra Iosifovna of Russia

** George Charles Constantine Bruce, Lord Bruce ( 1800 – 1840 )

** Constantine Samuel Rafinesque, Faculty: a professor of botany at Transylvania University in 1819, teaching French and Italian as well.

** Constantine Township