Villa Wolkonsky is the official residence of the British ambassador to Italy in Rome. The entrance to the villa is located at 4, Via Ludovico di Savoia.
Wikipedia https://en.wikipedia.org/wiki/Villa_Wolkonsky
Address 10 Via Ludovico di Savoia, Roma 00185, Italy
Coordinates 41°53'18.536" N 12°30'36.108" E