The road sign clearly displays Italian text, specifically "Via di Campo Marzio," which is a historic street in Rome. The architecture, with its tall, pastel-colored buildings and narrow, cobblestone street, is characteristic of the Roman city center. The "no parking" signs are standard Italian regulatory signage. I am very confident this is in the heart of Rome, Italy.

I suspect this is in Rome, Italy. I am 95% sure.

then: guess