June 18, 2010

ante diem xiii kalendas quinctilias 240 B.C. — Eratosthenes calculates the circumference of the earth (I have no idea what the source for this is) rites at the Temple of Minerva on the Aventine ca. 165 (?) — martyrdom of Protase 325 A.D. — Hosius announces the Nicene Creed during the First Council of Nicaea

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