Torre di San Giovanni

Between Alghero's land gate and its sea bastions stands the middle tower of the walled circuit, its vault picked out with radial ribs in the Catalan-Aragonese manner. Managed by Fondazione Alghero as one of the city's exhibition spaces, Torre di San Giovanni now hosts shows and events inside sixteenth-century masonry.

Why it matters

Alghero's wall circuit keeps eight town towers from its sixteenth-century rebuilding, and the Torre di San Giovanni is the middle one of the line, standing on the ramparts roughly halfway between the Porta Terra gate and the sea front. Its neighbours have postcard roles — the Sulis tower over its square, San Giacomo over the port — but San Giovanni has a working one: it belongs to the small group of towers that the Fondazione Alghero runs as cultural venues, and it functions as an exhibition hall for the city's museum system, pairing a bookshop with rotating displays inside a genuine piece of military architecture. The tower shows how Alghero’s fortifications have been adapted as cultural spaces.

What to notice

The tower belongs to the Catalan-Aragonese building tradition that shaped Alghero's towers, in deliberate contrast with the Italian-style artillery bastions added along the same walls: radial ribs, or costoloni a raggiera, spring from its vault as a decorative signature of that tradition. Inside, the circular room retains the character of sixteenth-century town-wall engineering rather than palace architecture. The tower stands between Porta Terra and Torre di Sulis, with the seaward bastions extending beyond.

Context and history

The tower took its place in the great sixteenth-century modernisation of Alghero's defences, after Ferdinand II of Aragon ordered the walls inspected in 1500 and work on artillery-age bastions began in 1514 under the engineer Pedro Malpasso. As that campaign rebuilt the circuit for gunpowder, the city's towers kept their Catalan-Aragonese character while the new bastions followed Italian military practice. The Savoy state upgraded the fortress from 1720, then the Regio Decreto of 25 April 1867 dissolved the kingdom's fortifications; Alghero demolished much of its landward front, but the town towers along the surviving walls escaped that fate. San Giovanni's second life came in the twenty-first century, when the Fondazione Alghero listed it, together with the towers of Sulis and Porta Terra, in its fortification system of exhibition spaces.