Agia Triada Monastery, Sparmos, Eastern Orthodox monastery on Mount Olympus, Greece.

Agia Triada Monastery, also known as Sparmos Monastery, is an Eastern Orthodox monastery on the southwestern slopes of Mount Olympus, at around 3,300 feet (1,000 m) above sea level. It consists of a stone church, side rooms used as a museum and religious shop, and a courtyard with colonnades and benches.

The exact foundation date is unknown; records show the monastery was already inhabited by 1386. It is stauropegic, under the Patriarch of Constantinople. The katholikon was renovated and painted in 1633, and the monks' cells were completed around 1739. After the last monks left in the 1910s, it stood empty for about 80 years until reconstruction began under Metropolitan Basileios and monks returned in 2000.

The monastery keeps a museum with precious vestments, silver liturgical vessels, embroidered textiles and documents, alongside its oldest icons from 1633. Monks practised bookbinding here from the 17th to the 19th century, and many of their manuscripts and books are now held at the Panagia Olympiotissa monastery, with some examples shown in the museum.

As an active religious site, visitors are expected to dress modestly, covering shoulders and knees before entering. Some areas may be closed during services, so it is worth checking before heading inside.

The church floor is made of marble with inlaid patterns using a mix of stone types, bricks, and natural rock. This level of craft is unusual for a monastery at this altitude and in such a remote location.