Zalavas (Polish: Zułowo, Belarusian: Зулаў, Zulaŭ) is a small village in Švenčionys district municipality, Lithuania.

Soon afterward the family was forced to sell most of their property in Lithuania including Zalavas and nineteen other villages, to pay for legal expenses and fines for Bronisław, who was involved in an assassination attempt on the life of Tsar Alexander III of Russia.

However, as the policies of Russification of former lands in the Polish–Lithuanian Commonwealth forbade Poles to purchase any real estate, he was forced to sell it to a Russian merchant from Riga named Klim.

Since the former Piłsudski's property had belonged to a Russian official who abandoned it, it was nationalized, and limited to the core of 65 hectares, and attached to a military base located nearby.

In 1934 an association of veterans of the Polish–Soviet War purchased it from the army and a committee was created whose aim was to rebuild the manor of Marshal Piłsudski, who by then was regarded by many Poles as the country's national hero.