Colonna is the III rione of Rome and located at the city's historic center in Municipio I. It takes its name from the Column of Marcus Aurelius in the Piazza Colonna, the rione's main piazza. Today the rione covers 0.2689 km2 and as of 2011 had 2547 inhabitants. The rione reaches to one side of the Pincian Hill. During the short-lived Roman Republic of 1798 it also included the hill itself and was called Pincio rather than Colonna.
The rione's insignia (or stemma) is a now a silver column representing the Column of Marcus Aurelius on a red background. However, the insignia originally consisted of three azure bands against a silver background.
Coordinates: 41°50′N 12°45′E / 41.833°N 12.750°E