San Guido, Oratory in Castagneto Carducci, Italy

San Guido is an oratory in the hamlet of San Guido, in the municipality of Castagneto Carducci. Its facade has a door with a curved pediment, above which is a white marble memorial plaque. Inside, the stone and white marble altar with stucco work is attributed to Romolo Della Bella.

The Della Gherardesca family built this oratory in 1703 to honor a family ancestor. This construction reflects a common practice among Tuscan nobility of the period to establish private chapels on their lands.

The oratory takes its name from Guido, a hermit who lived between the 11th and 12th centuries and was an ancestor of the Della Gherardesca family, who commissioned the building in 1703. The site is also tied to Giosuè Carducci's poem in quatrains "Davanti San Guido", which made the church famous.

The oratory stands in the San Guido locality of Castagneto Carducci, beside the Variante Aurelia asphalt road and a short distance from the Maremmana railway line. It is reached by car or on foot along the roads of the locality; there is no dedicated visitor infrastructure, so plan the stop as brief and self-sufficient.

The white marble memorial plaque above the curved-pediment door is easy to miss: it commemorates Guido, the hermit ancestor of the Della Gherardesca who lived between the 11th and 12th centuries, for whom the oratory was built in 1703. The interior altar in stone, white marble and stucco is attributed to Romolo Della Bella (18th century).