built in the pontificate of Urban VIII., from the design of Bernini.
The first flight is composed of Ionic columns, the second of
pilasters. The ornamental stucco work is from the designs of Algardi.
The equestrian statue of Constantine is by Bernini. On the first
landing, a passage leads to a small flight of steps. _At the top, on
the right, through a small red baize door, is the entrance to_