The Porta Bifora, also known as Porta Ghibellina, is the only known original monumental Etruscan gate to have been preserved to this day; the gate originally featured a single arch traces of which were discovered during the excavation. The new double-arched gate featuring an inner gate was built in the first half of the 2nd century B.C. The stunning stone-paving of the inner gate attests to the ceremonial character of this gate from which a large road wound its way down the hill to the main Hellenistic necropolises of Cortona. The gate was later reduced, in the late-antique period, to one single-opening, the northern one, and survived to this day in this form going through several changes.