Inside the edifice there is a beautiful two-storey colonnade which runs along the north, west and south sides, and bears an elegant inscription in twelve Greek hexameters dedicated to the Emperor Justinian, his wife, Theodora, and Saint Sergius, the patron-saint of the soldiers of the Roman army. For some unknown reason, Saint Bacchus is not mentioned. The columns are alternately of verd antique and red Synnadic marble; the lower storey has 16, while the upper has 18. Many of the column capitals still bear the monograms of Justinian and Theodora.