The monumental Palazzo Vecchiarelli, designed by Carlo Maderno at the end of the sixteenth century, presents an elegant façade that harmoniously fills the difference in height between the street level and the sequence of large windows on the ground floor, lined up alongside the majestic ashlar portal surmounted by the balustraded loggia of the noble floor.

The windows of the third floor and the attic are progressively lower than those of the representative floor, but they also boast rich and elegant frames, whose decoration is repeated and exalted in the rich splendor of the eave.
The elegance of the façade precedes the grandeur of the internal courtyard, on which a loggia opens up with extraordinary scenographic suggestions.
A stone coat of arms commemorates Monsignor Mariano Pietro Vecchiarelli, Legal Secretary of the two Signatures at the Roman curia.