The small town of Coreglia is first documented in the 10th century, and there is mention of the two churches dedicated to S. Martino and S. Michele in the "Estimo" of 1260. The latter, dated to the 12th century, originally held the role of castellan church, of which there are visible traces in the bell tower, the old tower of the castle, where slits and lookout points are still present. Greatly renovated in the 19th century, the building has some remains of the original Romanesque plan, especially in the façade and right hand wall. Between the 13th and 14th century, the chapel of S. Filippo was added to the right side, almost like a transept. The single nave interior contains a number of important works, including a 15th century christening font and a holy oil shrine recently attributed to Matteo Civitali, or possibly one of his close apprentices. A marble composition of the Annunciation, and a 14th century Archangel Michele, a work linked to Giovanni Pisano, attributed to both Giovanni di Balduccio and Lupo di Francesco, are also worth noting.