Leo III, Leon III, or Levon III may refer to:
; People
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Leo III the Isaurian
Leo III the Isaurian ( gr, Λέων ὁ Ἴσαυρος, Leōn ho Isauros; la, Leo Isaurus; 685 – 18 June 741), also known as the Syrian, was Byzantine Emperor from 717 until his death in 741 and founder of the Isaurian dynasty. He put an en ...
(685-741), Byzantine emperor 717-741
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Pope Leo III
Pope Leo III (died 12 June 816) was bishop of Rome and ruler of the Papal States from 26 December 795 to his death. Protected by Charlemagne from the supporters of his predecessor, Adrian I, Leo subsequently strengthened Charlemagne's position b ...
(d. 816), Pope 795-816
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Leon III of Abkhazia
Leon III () was King of Abkhazia from 957 AD until 967 AD. He was the second son and successor of George II of the Anchabadze dynasty.
Life
He succeeded in 926 as viceroy of Kartli to his older brother Constantine, the latter was blinded and c ...
, King of Abkhazia 960–969
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Leo II, King of Armenia
Leo II or Leon II (occasionally numbered Leo III; , ''Levon II''; c. 1236 – 1289) was king of the Armenian Kingdom of Cilicia, ruling from 1269''Cambridge Medieval History'', Volume IV, p. 634/1270 to 1289. He was the son of King Hetoum I ...
(c. 1236–1289), sometimes referred to as Leo III, ruled from 1269 to 1289.
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Leo III, King of Armenia
Leo III (or Leon III) hy, Լեւոն Գ, ''Levon III'') (occasionally numbered Leo IV; (1289–1307) was a young king of the Armenian Kingdom of Cilicia, ruling from 1303 or 1305 to 1307, along with his uncle Hethum II. A member of the Hethumi ...
(1287-1307), ruled from 1303 to 1307
; Other uses
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Leo A
Leo A (also known as Leo III) is an irregular galaxy that is part of the Local Group. It lies 2.6 million light-years from Earth, and was discovered by Fritz Zwicky in 1942. The estimated mass of this galaxy is solar masses, with at least 80% c ...
, an irregular galaxy in the constellation of Leo
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The Oath of Leo III, 16th-century painting about the 9th century Pope Leo III
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LEO III (computer), an early computer used for commercial business applications
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