Teatro dell’Opera
Walking route to Via Marghera 37.
Walk from Teatro dell’Opera ↗A Roman dinner before curtain-up: from Teatro dell’Opera di Roma to La Lupa is about 930 metres, around twelve minutes on foot, and the kitchen is already open in the afternoon.

Teatro dell’Opera di Roma is on Piazza Beniamino Gigli, near Via Nazionale. On OpenStreetMap’s walking route, from there to Via Marghera 37 is about 930 metres: through Piazza dei Cinquecento and Termini Station to the Via Marsala exit.
For dinner before a performance an early time works best: La Lupa’s kitchen is open without a break from the afternoon, so you can book for 6 or 6:30 pm and reach the theatre calmly. After the show the kitchen closes at 23:00: if you plan to come afterwards, call +39 06 8692 8542 first.
Walking route to Via Marghera 37.
Walk from Teatro dell’Opera ↗More sights on foot from here, with distances, times and two loops: things to see near Termini Station.
A Roman pasta and a main are enough to arrive at the theatre satisfied but light: cacio e pepe or carbonara, then saltimbocca. Put the show time in the booking notes: it helps the staff plan.

Pecorino · black pepper

Veal · prosciutto · sage

Dessert
About 930 metres on foot, around twelve minutes, via Termini Station.
Early, for example 6 or 6:30 pm: the kitchen is open without a break from the afternoon.
The kitchen closes at 23:00 and the last online time is 21:30: call the restaurant before coming.
Yes, every day from 12:00 to 23:00.
A table in Rome
Book an early table or open the walking route from the theatre.