Imposing the limit, which might later be modified, will “allow everyone to better enjoy the fountain, without crowds or confusion”, Roberto Gualtieri told journalists in front of the famous landmark.
Gualtieri also said the city authorities were considering charging a modest entry price to finance, among other things, the fountain’s upkeep.
The clean-up of the fountain and other key city sites, is aimed at “returning most of the monuments to the city in time for the start of the Jubilee” Claudio Parisi Presicce, Rome’s superintendent for cultural heritage sites, told AFP-TV.
The jubilee of the Catholic Church begins on December 24.
The Trevi fountain, a baroque masterpiece, is one of the most visited sites in Rome.
Featured in many films set in the city, it famously appears in a classic scene in Federico Fellini’s “La Dolce Vita”, when Anita Ekberg invites Marcello Mastroianni to join her in the fountain’s basin.