Designed by Francesco Borromini, The staircase is helicoidal, hence it follows the principle of turning on its rotational axis. It has an oval plan, flattened longitudinally, so providing easier ascent than staircases on a circular plan.
Each turn comprises twelve Doric double twisted columns and capitals decorated with small bees which is the Barberini family’s heraldic symbol. Light is shed through the oculus above.
There are two beautiful staircases in Palazzo Barberini, the other is designed by Bernini. You can see them both for free.
