REMOVE

1. skyscrapers

WHAT

1. architecture (object genr … (2)

WHERE

1. Berlin, Germany (1)
2. Germany (nation) (1)
3. Missouri (state) (1)
4. St. Louis, Missouri (1)

WHO

1. Mies van der Rohe, Ludwig (1)
2. Sullivan, Louis H. (1)

WHEN

1. 19th century (1)
2. 20th century (1)
3. Chicago School (1)
4. Modernist (1)