Zelenetsky-Troitsky Monastery, Orthodox monastery in Zelenets, Russia.

The Zelenetsky-Troitsky Monastery is an Orthodox monastery in the village of Zelenets, in Leningrad Oblast, made up of a cathedral, a bell tower, and a set of defensive towers. The buildings are arranged across an open compound in a layout that follows the traditional plan of medieval Russian monastic architecture.

The monastery was founded in 1564 by the monk Martyriy (Mina in the world), with Fyodor Syrkov, a merchant executed by Ivan the Terrible, among its builders. Swedish troops plundered and burned it in 1612–1613, and it was rebuilt to a single plan under Novgorod Metropolitan Korniliy. Most surviving buildings, including the Trinity Cathedral (1684) and the bell tower (1686), date from the 1680s. Closed in 1919, it was revived in 1993.

The monastery is an active place of worship where Orthodox believers gather for regular services throughout the year. Visitors can observe the rhythm of monastic life, from morning prayers to evening ceremonies, as it continues today.

The monastery is open throughout the year and can be visited on foot once you reach Zelenets, which is a small village with limited amenities nearby. It is worth checking in advance about visiting hours and service times, as the daily schedule follows the Orthodox liturgical calendar.

The monastery's founder, Martyriy, wrote an account of its founding, the "Tale of Martyriy of Zelenets"; the only surviving copy reached the Imperial Public Library in 1893 as part of Fyodor Buslaev's collection. The text, composed between 1570 and 1595, is a spiritual confession, a testament to his successor and a scribal note from the "Green Hermitage" clerk.