Sennitsy Estate, Ozyorsky District, Protected estate in Ozyorsky District, Russia.

Sennitsy Estate is a protected manor house in Sennitsy-2 village built with traditional Russian architectural forms. The buildings stand within natural landscapes of Moscow Oblast and form a unified ensemble of residential and service structures.

Sennitsy was first recorded in 1574 as the Gagarin family's ancestral estate. Prince Matvey Gagarin created the ensemble of mansion, five cascading ponds and park, and had the wooden church rebuilt in stone between 1701 and 1703, consecrated in 1707. In the early 1770s General Matvey Alexeyevich Gagarin replaced the wooden house with a stone two-storey mansion with a mezzanine and Ionic portico. The estate passed through the Golitsyn and Vielgorsky families, was nationalised in 1919–1920, and the main mansion burned in the 1930s.

The estate's name comes from the Sennitsa River, and the village was first recorded in 1574. The Gagarin family kept a burial vault in the Ascension Church. A legend tells that Matvey Gagarin had the road to the house strewn with silver coins before a visit by Peter I, who rebuked him for the waste.

The estate lies in Sennitsy-2 village, Ozyorsky District, on the bank of the Sennitsa River; the main house burned in the 1930s, so expect ruins rather than interiors. Only the manager's house and the stables were partly restored in the 1990s. Services resumed in the Ascension Church, so check locally before planning a visit.

The five cascading ponds each held a small island planted with exotic species, laid out on Matvey Gagarin's orders in the early 18th century. Legend says he had the road to the main house strewn with silver coins before Peter I's visit; the tsar reportedly rebuked him for wasting money the state needed.