This festival, which commemorates the town's patron saint along with Saint George, has been celebrated ever since the origins of the religious community here. Some decades ago the festival was moved from the precise day in the liturgical calendar (10 August) to the nearest Sunday. It lasts all afternoon and concludes with social events on the beautiful terraces around the Romanesque church.

Sources: Bertacchi G., Le Seimiglia, in Lucchesia Antica e Pittoresca, Maria Pacini Fazzi, Lucca, 1980