Arcazzi

The Arcazzi di Piscina are monumental stone structures on Anagni's northern slope. Two curved sections joined by a straight stretch preserve a substantial example of ancient squared-block masonry beneath the later town.

Why it matters

Generally dated to the late third or early second century BC, the Arcazzi belong to the Republican phase of ancient Anagnia. Their purpose remains debated: retaining structures supporting the hillside and elements of a defensive system are among the interpretations.

What to notice

The large, carefully laid blocks form the technique known as opus quadratum. In the western curved section, projecting courses create a false vault, revealing a construction method different from a conventional arch. A carved phallic symbol has an apotropaic meaning, intended to protect the structure.

Context and history

The remains drew the attention of antiquarian travellers and later structural researchers. Their position at Piscina has encouraged suggestions of a connection with ancient water installations or baths, although the precise function is not settled. Modern study has examined the geometry and forces within the masonry, adding an engineering perspective to the archaeological debate.