 The name comes from Monti Parioli, a series of tufa hills, and was given to the area before its incorporation into the city proper at the beginning of the 20th century.Some suggest that the name stems from "peraioli," as it was once the site of pear orchards.Parioli is among the first 15 "quartieri" of the city that were built beyond the Aurelian Walls, originally delimited in 1911 and officially established in 1921.