The worship of Augustus Caesar : derived from a study of coins, monuments, calendars, aeras, and astronomical and astrological cycles, the whole establishing a new chronology and survey of history and religion

#1

Interesting pdf from around 1900 talking about the ancient change in caledars from ten 36 day months to twelve 30-ish day months and the impact that may have on historical research

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#2

Augustus 27BC-14AD