Reader Question

This is a question courtesy Varsha.

X is a three story tall structure viewed from 30-foot long bridge through its interiors. It is made up of thick stained glass panels fitted into a bronze frame that holds the entire structure together. It was designed by an American architect and was opened to public in mid 1935. This structure has an unusual acoustic quality which was unintentional at the time of its construction. The odd acoustics are such that if two people stand at the end of the 30-foot bridge and whisper, they can hear each other as if they were standing side by side. The main purpose of X was for educational service. It is claimed that in X you can view the world in a unique perspective and just see how much the world had changed over time.

What is X and where is it located?

Hint: X invites comparison with another piece located outside a private business school in Wellesley, MA.