Tower of Talamonaccio, Defense tower in Talamone, Italy.

The Tower of Talamonaccio is a coastal defense tower in Tuscany that rises from a rocky promontory overlooking the Mediterranean Sea. It features a square base and multiple observation levels designed to command views of the surrounding waters.

The fortified complex began in the Middle Ages as a watchtower on the coast south of Talamone, while the territory was still held by the Aldobrandeschi. After passing to the Republic of Siena, it went to the Spanish in the second half of the 16th century, who enlarged and strengthened it and folded it into the coastal defence system of the State of Presidi, able to signal by sight to the Rocca di Talamone and the Forte delle Saline. In the first half of the 19th century, after annexation to the Grand Duchy of Tuscany, it was gradually decommissioned and later turned into a private dwelling.

The tower's name comes from the Talamonaccio promontory, and the site is near an area where many Etruscan and Roman finds have come to light. Weapons from the Battle of Camporegio, fought near the Osa stream, are kept inside: muzzle-loading and flintlock guns, helmets, shields and swords. A tile by the west door reads "Casa che guardi il mare, accogli sempre le persone care e dona loro con sincerità, pace, letizia ed ospitalità".

The tower stands on the Poggio Talamonaccio promontory in the municipality of Orbetello, above the Bengodi beach at the southern end of the Gulf of Talamone. It is now a private residence attached to later buildings, so it is seen from outside rather than visited inside. The entrance door faces west, and the seaward side carries the watchtower parapet.

The tower's interior holds a collection of hunting rifles of calibres from 8 to 24, plus muzzle-loading and flintlock guns, helmets, shields and swords found at the Camporegio battle site near the Osa stream. A small room that once served as the armoury, lit by a glass-brick window, keeps part of this material.