The Church of Sant’Eufemia rises in a panoramic position on the Sasso di Musso, between the Giardino del Merlo and the ancient marble quarries. The sacred building was part of the Rocca Medicea complex and was damaged during the battles against the Medeghino, which led to the destruction of the castle in 1532. The current construction dates back to 1622 and has a single nave plan with a quadrangular presbytery. The façade, preceded by a small portico on two columns, preserves some elements in worked Musso marble and inscriptions. Originally probably dedicated to S. Childerico, the church was later dedicated to Sant’Eufemia, a woman originally from Sueglio (Val Varrone) and protagonist of several legends. One of these narrates that the woman fled from her hometown because she was unwelcome by the villagers and managed to reach the opposite shore by cutting the waters of the lake with a saw; before finishing the crossing, under the Sasso di Musso, however, a bell fell, which she cursed, shouting: "get off, get off that you will never touch the bottom". People claim that the bell tolls during storms. After the death of Eufemia, who did good deeds in the area, the peasants of Musso and Dongo built a church in her honor with the door facing Musso; the Donghesi, at night, walled up the gate to open one facing their country but the following morning they always found it in its original position. The church can only be reached on foot.