(b Postawy, Lithuania, 20 July 1906). Polish architect and teacher. After graduating in architecture from Warsaw Technical University (1933), he worked as an architect for the City of Warsaw, first at the District Regional Office and then at the Main Spatial Planning Office (1944–9). His best-known work is the Central Department Store (1948–51; with Jerzy Romanski), Jerozolimskie Avenue, Warsaw. It was an essay in canonical early modernism, incorporating all Le Corbusier’s ‘five points of a new architecture’: structural walls were replaced by columns to allow an open plan and fully glazed façades; windows were expressed as continuous horizontal bands of glazing between the exposed edges of the floor slabs; there is a pedestrian way through at ground level beneath the building and a roof terrace, used as an open-air coffee house. From 1949 to 1956 Ihnatowicz was a planning consultant for workers’ housing estates and from 1951 to 1964 Chief Architect for Prochem Industrial Buildings design office. Avoiding the pompous and eclectic style prevailing at the time, he employed industrial building techniques in his work, as in the light shell roofs he designed for his rolling stock repair yard (1951), Minsk Mazowiecki, near Warsaw. Other works included the Start sports stadium (1955; with Jerzy Soltan, Wojciech Fangor and Lech Tomaszewski); another stadium (1955) for Warsaw City Sports Club; the Sródmiescie underground railway station (1963; with others), Warsaw; and the Wenecja restaurant (1958–61; with Soltan), Warsaw, the elevations of which were designed as an abstract geometric composition of different textures and colours, based on the rhythm of the structural system. Working with others, he was also involved in the design of many pavilions for international exhibitions, including those in Damascus (1955), New York (1958), Tunis (1962), Budapest (1964, 1965 and 1969), Zagreb (1968) and Lima (1971). In 1956 Ihnatowicz became a teacher at the Academy of Fine Arts, Warsaw, and was appointed Professor in 1973.