columna Cochlis

A column with a spiral staircase running through the centre so as to furnish a meaus of ascent to the top (Victor, De Reg. Urb. Rom. 8 and 9). These were usually columnae triumphales, surmounted by the statue of the person in whose honour the column was erected. Two still remain at Rome: (1) the Column of Trajan (shown in the illustration), erected by Apollodorus, A.D. 104; and

(2) the Column of M. Aurelius Antoninus.