In the middle of Piazza Colonna is a great column: the Marco Aurelio Column. At the top of the column sits a Saint Peter Sculpture (an idea of Sixtus X). The column, very similar to the Traian one, was built in the years 176-193 to commemorate the victories of this emperor against the Germans and Sarmaths. If you want to admire the reliefs in detail you will have to go to the Roman Civilization Museum, where you will find a copy of the column.