REMOVE

1. windows
2. farms
3. trees
4. black-and-white film
5. sky
6. towers (building divisions)

WHAT

1. Visual Works (hierarchy n … (1)
2. atmospheric perspective (1)
3. barns (1)
4. buildings (structures) (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1967 (1)