he started a carpentry factory which became subsequently a shop for construction work called O.B.W (Ostdeutsche Bautischerei Werkstette) during the Occupation.
He engaged in intensive cultural and social work. His daughter, aged 18 in 1942, was
a Resistance activist. During the mass deportations, the OBW workshop became
a place of refuge for scores of activists, especially those belonging to Hashomer Hatzair and the Left-Wing Poale Zion. Joseph Lewartowski-Kinkelstein, co-director
of the Antifascist Bloc, hid out there.
His social position enabled him to save
the lives of several Resistance men.
In April 1943, Alexander Landau left the Ghetto along with his son, in possession of a passport from a neutral country. Transiting via the Polski Hotel, he was sent to the Vittel Camp,
in France. After several months of waiting,
he was sent to Drancy, then deported to Auschwitz where he was murdered.
