Pusey Library

{{Short description|Underground library at Harvard University}}

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{{infobox library

| name = Nathan Marsh Pusey Library

| image = File:Pusey Library, Harvard University, Cambridge MA.jpg

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| established = February 1976{{Cite web|title=At Last The Library Opens |website=The Harvard Crimson|author-last=Gleick|author-first=James|date=February 21, 1976|url=https://www.thecrimson.com/article/1976/2/21/at-last-the-library-opens-pwhen/|access-date=2022-01-22}}

| architect = Hugh Stubbins and Associates, Inc.

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| location = Harvard University, Cambridge, Massachusetts, United States

| coordinates = {{coord|42|22|23|N|71|6|55|W|display=inline,title}}

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Nathan Marsh Pusey Library{{Cite web|title=Pusey Library {{!}} News {{!}} The Harvard Crimson|url=https://www.thecrimson.com/article/1976/4/24/pusey-library-pharvard-administrators-and-their/|access-date=2022-01-24|website=www.thecrimson.com}}{{Cite book|last=Bryant|first=Rene Kuhn|url=https://books.google.com/books?id=3lpEAAAAIAAJ|title=Change and Continuity in the Harvard Yard: The Nathan Marsh Pusey Library|date=1976|publisher=Harvard College Library|language=en}} is an underground library located inside of Harvard University. It was announced in June 1971 and was named after Nathan Pusey, the president of Harvard from 1953 to 1971. The library is the world's first library to be built with a halon-gas fire-extinguishing system. The building contains the Harvard University Archives.