Trajan's Column
The column is about 30 metres (98 ft) in height, 35 metres (125 ft) including its large pedestal. It is made from a series of 20 hollow Carrara marble pieces. Each one weighs about 32 tons, with a diameter of 3.7 metres (11 ft). The 190-metre (625 ft) frieze winds around the column 23 times. Inside the column, a spiral staircase of 185 steps gives access to a viewing platform at the top. The capital block of Trajan's Column weighs 53.3 tons, which had to be lifted to a height of c. 34 m.