11 Diagonal Street : completion_date : 1983 | 11 Diagonal Street : floor_count : 20 | 11 Diagonal Street : architect : Helmut Jahn | 11 Diagonal Street : floor_area : 1200 (square metres)
Helmut Jahn was the architect of 11 Diagonal Street which was completed in 1983 with 20 floors and a total floor area of 1200 square metres.