Osnos Tenement House in Warsaw, Tenement house at Twarda Street 28 in Wola, Warsaw, Poland

The Osnos Tenement House at 28 Twarda Street is a 1911 brick building in Wola, near Rondo ONZ. It is a remnant of the old course of Twarda Street, which was later split by aleja Jana Pawła II. Inside, remains of rich architectural decoration survive, though the building has been empty since residents were evicted in 2009.

Built in 1911, the tenement stood with the neighbouring house at Ciepła Street 3 inside the Warsaw Ghetto from 1940 to 1942. It survives as a relic of the old course of Twarda Street, which was later cut in two by Julian Marchlewski Avenue (now John Paul II Avenue) and Rondo ONZ. Residents were evicted in 2009 and the ground-floor shops closed; in 2019 the building was entered in the register of monuments.

The building is named after Leib Osnos, the owner who commissioned it in 1911. Its ground-floor shops closed in 2009, the same year all residents were evicted, so the former commercial floor now stands empty behind the facade at Twarda 28.

The building received official monument status in 2019 and can be easily viewed from the street as you walk through the neighborhood. Its central location makes it accessible on foot during a walk through Warsaw.

The building is a remnant of the old course of Twarda Street, which was cut in two after the war by the road now called Aleja Jana Pawła II and Rondo ONZ. Its neighbour at Ciepła Street 3 shared the same wartime fate in the ghetto.