A total Solar eclipse over Constantinople, on December 22, 968, CE at the Winter Solstice, is described by the Byzantine chronicler and historian, Leo the Deacon. His account is considered the earliest known description of the Sun's corona during a total solar eclipse, even mentioning the terrified reactions of the people, highlighting the unfamiliar nature of the event.
His account of the event, in his book "The History of Leo the Deacon." reads in part, "Everyone could see the disk of the Sun without brightness, deprived of light and a certain dull and feeble glow, like a narrow headband, shining round the extreme parts of the edge of the disk". Noting that darkness fell upon the Earth and "all the brighter stars revealed themselves".