San Rabano, Romanesque abbey ruins in Maremma Natural Park, Grosseto, Italy

San Rabano is a ruined abbey on a saddle at about 320 m between poggio Uccellina and poggio Lecci in the Maremma park. Its church has a single nave, a transept joining two side chapels, and three rear apses, the central one semicircular and wider. The square bell tower rises in orders of four monofore then four bifore, without a spire; the church has no roof.

The site was founded between the 11th and 12th centuries as a Benedictine monastery serving religious communities for centuries. In 1307, it passed to the military Order of Saint John, which reshaped the structures for defense.

The name San Rabano refers to Saint Rabanus Maurus, though the abbey was first called Santa Maria Alborense, after Monte Alborense where it stands. The site is now a ruin inside the Maremma nature park, reached on foot along the trails of the Uccellina hills.

The site sits within a nature reserve and can be explored on foot. The paths are accessible, and restoration work from the early 2000s has stabilized the structures enough for close examination.

Three crosses are carved on the architrave of the main portal, one in the centre and two at the sides, not scattered on the walls. They are easy to miss when the decorated doorway is viewed from a distance.