Part deli, part restaurant, and one of Rome's most celebrated dining destinations. The walk-in deli counter at the front sells exceptional cheese, charcuterie, and anchovies; the restaurant at the back requires a reservation and serves landmark versions of cacio e pepe and carbonara alongside a wine list of several thousand labels.
Book the restaurant weeks ahead. If you can't get a table, the deli counter is walk-in and the sandwiches are outstanding.