Castello Pomerio, Medieval castle in Erba, Italy.

Castello Pomerio is a medieval fortress in Erba with a rectangular layout and two centuries-old mulberry trees in its courtyard. Stone walls display family crests, and the building offers spaces both indoors and outdoors for various purposes.

The castle belonged to the Parravicini family and was modified by Beltramino Parravicini. It later passed to the Visconti, then the Carpani, the Archinto in 1647, back to the Parravicini in the late 17th century, and to the Corti family in 1714, who set up a silk works there in the 19th century. In 2026 it returned to the Parravicini.

The castle's name comes from the Pomerio district of Erba, and the building long served as a fortified residence of the Parravicini family. Inside, 14th-century frescoes survive on the walls; restoration work also brought to light fragments of tableware from the same period, now kept at the Civico Museo Archeologico di Erba.

The site accommodates up to 300 people and can be used for various events, with facilities for civil ceremonies. Its combination of indoor and outdoor spaces allows flexible use for visitors and organizers.

Archaeological excavations uncovered two restored wells in the courtyard, revealing details about medieval infrastructure. Alongside these structures, ceramic fragments from several centuries were discovered.