Photo:  Art Institute of Chicago
Argentina Pavilion,  1939 World's Fair, Flushing Meadow,
Queens; architect: Aymar Embury II[1,2,3].  Demolished after the fair.
I don't know if this was a private commission or he was loaned out by the
Parks Department to advise or assist the principal architect, Armando D'Ans.
I'll err on the side of inclusion.
References:
- Pencil
Points, v.XX No.6, June 1939, p.8: "New York World's Fair ...
Argentine Pavilion: Architect: Armando D'Ans; Associate:
Aymar Embury II".
 - 1939
World's Fair: Argentina, 1939nyworldsfair.com: "Architects: Armando
d'Ans and Aymar Embury".
 - Aymar Embury
II, North Carolina Architects & Builders: A Biographical
Dictionary, ncarchitects.lib.ncsu.edu: "[Embury] was also the architect
for the New York City and Argentine Pavilions at the 1939 World's Fair in
New York."