Widney Hall, Historical building at University of Southern California, United States.

Widney Hall is the original building of the University of Southern California, dedicated on September 4, 1880, and in continuous educational use since students entered on October 6, 1880. It stands on land given by Ozro W. Childs, John G. Downey and Isaias W. Hellman, built under Judge Robert M. Widney, the university's leading founder. It is Los Angeles Historic-Cultural Monument No. 70 and California Historical Landmark No. 536.

The building was completed in 1880 as the first structure on the University of Southern California campus and marked the institution's beginning. It played an important role in shaping the early character of the university.

The building carries the name of Judge Robert M. Widney, the university's leading founder, and is known as Widney Alumni House. A landmark plaque on the building records its dedication on September 4, 1880, and the opening of its doors to students on October 6, 1880, by first president Marion McKinley Bovard.

The building is located at 650 Childs Way in Los Angeles and is accessible to visitors walking the campus. It is best explored as part of a walk through the historic sections of the grounds.

The landmark plaque records that the building opened to students on October 6, 1880, under the university's first president, Marion McKinley Bovard. It stands on land given by Ozro W. Childs, John G. Downey and Isaias W. Hellman, and was built under the direction of Judge Robert M. Widney, the university's leading founder.