A Trastevere institution since 1933, Ai Marmi (the official name is Panattoni, but no one calls it that) is exactly what you’d expect in an Italian neighborhood pizzeria—zero frills, lots of character, and authentic, thin-crust Roman pizza. This is the kind of place to hit for a quintessential Roman vibe, thanks to the requisite lineup of city favorites like fritti, fried cod, fried zucchini flowers, and supplì—mozzarella-filled fried rice balls. The shop gets its nickname from the long marble slabs that top the family-style tables (ai marmi means “marble” in Italian).