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Then I saw a beast come out of the sea with ten horns and seven heads; on its horns were ten diadems, and on its heads blasphemous names.
— Revelations 13:1
— Revelations 13:1
M. E. Rothwell • The Leviathan

We also learn that King Og was a Rephaite—a giant, perhaps of demonic origin—and Israel defeated him. He had a bed that was thirteen and a half feet long and six feet wide, and it was made of iron because apparently, that was the only thing strong enough to hold him.
Tara-Leigh Cobble • The Bible Recap: A One-Year Guide to Reading and Understanding the Entire Bible
History of the Decline and Fall of the Roman Empire, all six volumes, with active table of contents, improved 2/1/2011
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Active for over fifty years, Porphyrios caused great concern for Byzantine seafarers. Emperor Justinian I (r. 527–565) made it an important matter to capture it, though he could not come up with a way to do so.