The Palazzo Ruspoli was the residence of a noble Roman family who acquired it in the second half of the 17th Century and still own it. It was designed by Bartolomeo Ammannati in the second half of the 16th Century for a Florentine family. Entering the courtyard you are in a portico with antique sarcophagi under the arches. The Palazzo is now the site of photographic, art, and archaeological exhibitions. The magnificent marble staircase with one hundred steps, each hewn from a single piece of stone, is a marvel.