The Catholic University of America

Mullen Library Stacks Directory

Enter call number of a book in Mullen Library and the system will show it on the map.

PDF version of Mullen Stacks Directory


This directory shows the location of material in the Mullen Library stacks. The stacks of Mullen Library are located on the east side of the building. To find out where an item is located, look for its call number. The call numbers are listed alphabetically, in ranges. Above each range is the stacks location for items within that range.

The stacks are organized in alphabetical call number order. The General Stacks begin with A in 3A North and continue on to 3A Center and 3A South before picking up again in 3 North and so on. Periodicals are housed in two rooms on the first floor of the stacks.

Note that periodicals are separated from the rest of the stacks, and shelved in the Periodical Stacks, 1 North to 1 South. For example, a book with the call number LB 1047.3.U75 would be located in section 2 Center (General Stacks), but a journal with this call number would be found in 1 Center (Periodicals Stacks). If you can't find an item, please see a reference librarian at the Information desk on the first floor.

Please note that the stacks usually close a half hour before the Circulation desk.

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