Cornell University did something similar, adding the Kroch Library
underground in an effort to preserve their historic Art Quad.  The
new underground library is nestled between Olin Library, Stimson
Hall, and Goldwin Smith Hall (I wonder if the tie-in to GS Hall had
an impact on the art gallery where Ken Follett did a poetry reading
back in the 70's...).  A friend who did the structural design work
told me about the project or I likely wouldn't have know the building
existed.

I don't know what impact it may've had on the adjoining buildings.
Olin Library dates from the late 50's or the early 60's and isn't of
the same style as the other buildings on the quad so any impact on
Olin may be less of a loss (showing a prejudice against new
architecture).  I haven't been in the building myself.

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