11 Diagonal Street : completion_date : 1983 | 11 Diagonal Street : floor_count : 20 | 11 Diagonal Street : architect : Helmut Jahn | 11 Diagonal Street : building_start_date : "1978"
The building at 11 Diagonal Street was completed in 1983 , 5 years after the street itself was build in 1978. It is a 20 floor structure designed by Helmut Jahn.