The ancient building still shows the remains of the east-facing minor Romanesque church, dedicated to Saint Martin and its boundary walls on either side of the nave. Worthy of note are also the decorations in the apse and the well-preserved facework with a number of sections with a fishbone design.

Graines castle’ s ruins can be reached by taking the regional road going up from Verrès towards Ayas, and turning right after the Arcesaz hamlet, in Brusson: from here on, a short path goes through a cherry tree wood, wonderful to see during the spring and autumn months.