The exact dating is not possible, since the year of the consulate does not correspond to the year of indiction. The 37th year after the consulate of Basilus was either 577 (using modus Victorianus) or 578 (using modus Marcellianus). The twelfth year of the indiction starts in 578, but on the 1st of September. Since the inscription dates to the 9th of March (the 7th ides of March), the year 579 must also be taken into consideration. For more on the problems with agreeing the years of consulate with the years of indiction, see RICG, Introduction, nos. 93, 94, and 98.