Founded in 1846, the St. Louis Mercantile Library is the oldest general library in continuous existence West of the Mississippi River. The Mercantile Library resides on the first two floors of the Thomas Jefferson Library building beneath its signature glass pyramid.
1 University Blvd., St. Louis, Mo. 63121-4400
On Campus
314-516-7240
Mon: 12:30pm-4pm, Tues-Thur: 9am-4pm
