REMOVE

1. libraries (buildings)
2. Visual Works (hierarchy name …
3. fronts (architectural)

WHAT

1. arcades (structural assem … (1)
2. artists (visual artists) (1)
3. barriers (1)
4. benches (furniture) (1)

More 

WHERE

1. New York, New York (1)

WHEN

1. 1964 (1)
2. ca. 1964 (1)