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Hours

The St. Louis Mercantile Library is located in the same building as the Thomas Jefferson Library at the University of Missouri-St. Louis.  Exhibitions can be viewed during normal Thomas Jefferson Library hours; all exhibitions are free and open to the public.

Viewing rare books and archival materials can only be done in the reading room, which is open on specific weekday mornings and afternoons.  In observance of security procedures, certain services may not be available shortly before the daily closing time.

 Standard hours for the Reading Room are:
Monday: 12:30pm - 4:00pm
Tuesday: 9:00am - 12:00pm
1:00pm - 4:00pm
Wednesday: 9:00am - 12:00pm
1:00pm  -  4:00pm
Thursday: 9:00am - 12:00pm
1:00pm  -  4:00pm
Friday-Sunday: CLOSED

Please note that these hours are subject to change with the Academic Year calendar or campus closures. We strongly encourage researchers to check the Academic Year calendar and call ahead before visiting.

For a complete list of library hours and exceptions for the current Academic Year, visit University Libraries Hours for the Academic Year.

For general updates, please visit University Libraries.

For questions about hours and holiday closings, please call

(314) 516-7240 or (314) 516-7247