The Pieve di Santa Maria Assunta in Stia, built around the second half of the 12th century by the Guidi Counts of Porciano, is considered one of the most interesting churches of the Casentino. The church replaced a pre-existing one dedicated to Saint Mary of the Assumption, with its first documented mention dating back to 1017. Excavations in the 1970s uncovered remains of the earlier church, as well as evidence of an even older worship building dating back to the Etruscan-Roman period. The church has undergone several renovations, with its current facade reflecting a late-Baroque style. The bell tower’s lower part is coeval with the church, while its top has been renovated multiple times. The church’s Romanesque style, with its nave and two side aisles separated by two lines of columns topped with elegant capitals, has been preserved despite several restoration works.