Bayan Beleq Mosque, Ancient mosque in Bayan village, North Lombok Regency, Indonesia.

Bayan Beleq Mosque is a house of worship in Bayan village, North Lombok Regency, built using traditional construction methods. The structure measures about 9 by 9 meters and combines bamboo, hardened clay, and stone to form a solid building.

Bayan Beleq Mosque is the oldest mosque on Lombok, built in Bayan village, the area where Islam was first introduced on the island. Sources place its construction between the 16th and 17th centuries, and researchers still debate the exact date. It was founded by Gaus Abdul Rozak, one of the first spreaders of Islam in the region, whose grave lies inside the mosque.

The mosque is the centre of Wetu Telu rituals, including a two-day Maulid Nabi celebration in which visitors must wear Sasak dress such as dodot and sapuk. Pilgrims carry water in vessels made from gourd fruit for the Ngaji Makam tradition. The Bayan community expresses its philosophy as "Adat Wadah, Agama Diri" — custom is the vessel, religion the guide.

The mosque stands in Bayan village, about 80 km from Mataram, the provincial capital. Visitors entering during Maulid processions must wear Sasak traditional dress such as dodot and sapuk. The building is small and low, so it is easy to miss from the road; look for the bamboo roof among the village houses.

The mosque keeps a wooden bedug drum hung from the roof posts, and pilgrims carry water for the grave rituals in vessels made from gourd fruit. Repairs are traditionally made only in the year Alif of the Islamic calendar, during Muharram.