Torre Civica (Porta della Bollente)

Beside the Bollente fountain rises Acqui Terme's Civic Tower, a gate-tower from the late twelfth or early thirteenth century that locals call "senza fondamenti" — foundationless — because it stands leaning on the neighbouring houses. In 1763 it became the city's clock tower, and it still anchors the square that holds the town's symbol.

Why it matters

Acqui Terme’s Civic Tower preserves one of the main gates of the medieval walls, guarding the approach to the spring that made the town famous. Known as Torre senza fondamenti, or “foundationless tower,” it rests against adjacent houses, a common feature of construction in dense walled towns. Its later history layers perfectly onto the square's story. In 1763 the old gate was converted into the civic clock tower by widening the access arch and raising the upper section for the city bell. Medieval defence, Enlightenment civic time and thermal-era monument-making meet in one structure.

What to notice

The layers are visible from the base upward. At street level, the widened arch marks a later intervention: the 1763 conversion enlarged the medieval gate's opening, changing a defensive passage into an open frame for the square. In the upper section, added during the eighteenth-century remodelling, are the clock and housing for the city bell, designed by the Alessandria architect Giuseppe Domenico Trolli. The contrast between the medieval lower masonry and the raised upper section marks the transformation from gate to clock tower. The marble pavilion over the hot spring connects the tower with the square’s later spa-era history. The name Torre dell'Orologio reflects its civic role from 1763.

Context and history

The gate-tower dates from the late twelfth or early thirteenth century, when Acqui Terme's commune enclosed itself in walls and controlled access to the Bollente district. Standing without its own foundations, propped on the surrounding houses, it took the nickname that still distinguishes it. In 1763, architect Giuseppe Domenico Trolli designed the conversion, widening the old gate arch and adding the upper section for the clock and city bell. The tower's civic function endured through later changes to the square, including construction of the Bollente pavilion in 1879 and the urban reshaping of 1870–1880 under Giuseppe Saracco. Its masonry brings together the town's medieval, eighteenth-century and spa-era histories.