About the location (from here):
This splendid square was conceived by Michelangelo, who also designed the two palaces on the opposite sides of the square, whoose divergence creates a widening perspective which is most effective. It is reached by the grand flight of steps known as the “Cordonata”, built to a design by Michelangelo especially for the triumphal entry of the Emperor Charles V in 1536. Michelangelo placed on a new pedestal the equestrian statue of Marcus Aurelius (161-180), removed in 1981 for some delicate restoration and situated on the ground floor of the Museo Capitolino.

Movies shot at this location:
Scene where Trisha confides to Sangeetha that she caused the accident from Manmadhan Ambu