Glem has two churches: the Church of the Assumption of Mary and the Church of St Nazarius.
The first is a stone-paved simple church with a rectangular floor plan and triple bell-gable, as well as two high-quality oil paintings (of St Josef and St Luke) and a stone holy water basin font from the 17th century.
The Church of St Nazarius was built in the 13th century. The Romanesque church has a semicircular apse and main façade finished with a bell-gable, and a wooden altar with a painting of St Nazarius from the 17th century. The church was partially renovated in the 17th century.