Here we see an American priest who works in the Vatican, Msgr. Calkins. He's a mariologist and both he and Msgr. Perle, for twenty years now, have been working for the Pontifical Commission Ecclesia Dei.
Most clergy who work in the Vatican today just wear what the Italians call "clergyman" or what others might call "tenue de ville" (the black business suit with clerical vest, etc.). To their credit, these two monsignori, always looking sharp, wear the soutane to and from the office. People notice this and it counts for a lot. Many thanks for this witness.