The Church of Son Martegn (St. Martin) stands on a small hill just above Savognin village, a simple Romanesque structure with a square tower that has looked over the valley since the 12th century. Inside, the whitewashed walls conceal remarkable medieval frescoes dating from around 1400, discovered and restored in the mid-20th century.
The frescoes depict scenes from the life of Christ, the Virgin, and several saints in a style characteristic of the late Gothic painting tradition of the Alps. The colours remain relatively vivid despite their age, and the iconography is detailed and unusual in places. The church is worth the short walk uphill from the village centre — it is usually unlocked during daylight hours.
The setting of the church on its promontory above the valley gives a good sense of how the Romansh communities of the Surses valley organised themselves around these hillside churches, each one visible from the next valley over.