In the Rome of today one sees these men all over and everybody asks the same question: "Who are these guys?" They are the Araldi di Vangelo (Heralds of the Gospel).
This is their Rome parish of San Benedetto in Piscinula in Trastevere (where St. Benedict once lived).
The Heralds act as a tremendous public witness in the Rome of today. They have members who attend a few Pontifical Universities and so they can often be seen atop the streets of Rome.
They are an "association" of pontifical right and their members are called "associates," who live in communty as celibates. They also have a "priestly branch" as well as "companions," married and single as well as "honorary members" and "supporters" who collaborate with them. They were founded in Brazil, but today are active in many countries. T.F.P. lives!
See thier site here: http://www.heralds.us/