The Parish Church of Santa Maria Assunta in Montemignaio, one of the most important Romanesque churches in Casentino, dates back to the 12th-13th centuries. Commissioned and promoted by Matilda, Countess of Canossa, the church’s origin is more likely linked to the presence of the Conti Guidi, lords of the Upper Casentino. Built by Lombard workers, the church boasts an east-facing apse and shares similarities with other Romanesque churches in the region.

Outside the church, a massive bell tower stands tall, originally built by the Lombards as a lookout post. Inside, visitors can admire three naves supported by six rectangular pillars and four columns, along with a semicircular apse. The church features a mix of architectural styles due to various refurbishments and modifications throughout its history.

Montemignaio has retained its medieval identity, with traces of the settlement of Castel Leone still visible today. The town is surrounded by lush oak and chestnut forests, a significant resource for the local community.

Every autumn, Montemignaio hosts the Sagra della Polenta, a festival celebrating cornmeal and chestnut flour polenta. The event features food stands, concerts, and exhibitions, all centered around a fiery log that creates a unique atmosphere.