The article touches upon the personality of Sergei Lazo, who entered the Soviet historiography as a hero of the civil war, and the need for the museumification of the Lazo family’s home in the village of Piatra. After analyzing the archival documents, the diary and philosophical notes of Sergei Lazo, his correspondence with friends and family members, the author comes to the conclusion that this Bessarabian nobleman was an adept of the fundamental ideas of democracy, an anti-monarchist, a passionate fighter against social inequality, who fought incessantly for democratic freedoms. The house in the village of Piatra, where Sergei Lazo was born, has been preserved and was restored; it is an architectural monument of national significance dating back to the 2nd half of the 19th century, and until the end of 2017 it should be museumified. The author offers the main idea, goals and thematic structure of the new exposition for the Country House of the Lazo Family at Piatra.