Old Nomentana Gate

Porta Nomentana is a single-arch ghost gate in the Aurelian Walls, built between AD 270 and 273 under Aurelian and later refaced in marble during Honorius's 403 restoration. Its right-hand semicircular tower survives, while the left incorporated a 1st-century tomb attributed to Quintus Aterius, whose materials were reused in later repairs. The gate once led toward Nomentum and held minor strategic importance, known in the medieval period as the Gate of St Agnes and Porta de Domina. Converted into a two-arch structure by Pius IV in 1564 — the same year Porta Pia replaced it as the main access to Via Nomentana — it was eventually sealed and now forms part of the boundary wall of the British Embassy. - AsNotedIn