The block of flats at 4 Graniczna Street is part of the historic Za Żelazną Bramą estate in Warsaw. Throughout the 1960s, despite the meagre sizes of the flats, it was one of the most desirable addresses in the city. Those lucky enough to be allocated flats there, came mainly from education and culture-related professions. Most of them are now retired. Meantime, some flats changed hands. They are now popular with young people at the start of their professional careers.