REMOVE

1. Concrete construction
2. Windows

WHAT

1. Architecture -- 1900-2000 (8)
2. Architecture -- England - … (6)
3. Offices -- England -- Lon … (6)

WHERE

1. ENGLAND, UK (8)
2. London (6)
3. FRANCE (2)
4. Manchester (2)
5. Eveux, Rhône (1)

WHO

1. SEIFERT, Richard (6)
2. GIBBON, W.A. (2)
3. LE CORBUSIER (2)

WHEN

1. 1967 (6)
2. 1962 (2)
3. 1952 (1)
4. 1961 (1)