Campus address: 601 University Drive NENOTE: for COVID-19 updated hours and services, visit the
University Libraries websiteFormally known as the John K. Mullen of Denver Memorial Library, Mullen, as it is commonly called, is the main library on campus.
It houses 1.3 million volumes, including special collections available to the University community and researchers from around the world. Catholic University is a partner in the Washington Research Library Consortium through which CUA students and faculty may use and request books and articles from other partner libraries.
Tutoring services at the University are headquartered in Mullen Library. Additionally, both the Math Center [Corner Reading Room] and Writing Center [219 Mullen Library] are located on the 2nd Floor.
Mullen was built between 1925 and 1928 in Italianate Revival style. It is an architectural focal point on campus, across the University Mall and aligned with the Basilica of the National Shrine of the Immaculate Conception. It also is the centerpiece of a three-building composition that includes Shahan Hall and McGivney Hall.
See below for more information about the library, its collections, hours, and services:
Mullen Library
Phone: (202) 319-5070
Friday: 8:00 am - 10:00 pm
Saturday: 9:00 am - 8:00 pm
Sunday: 11:00 am - 11:30 pm
Monday: 8:00 am - 11:30 pm*
Tuesday: 8:00 am - 11:30 pm*
Wednesday: 8:00 am - 11:30 pm*
Thursday: 8:00 am - 11:30 pm*
Stacks close 30 minutes before building.
*Open 24 hours with limited services to CUA Students.
Humanities Collections
314 Mullen; 202-319-5088
Rare Books and Special Collections
214 Mullen; 202-319-5091
Reference & Instructional Services
124 Mullen; 202-319-5070
Religious Studies, Philosophy and Canon Law
314/316 Mullen; 202-319-5088
Semitics/ICOR Library
035 Mullen; 202-319-5084