The Martin Maloney Chemical Laboratory was dedicated on November 15, 1917 and named for Martin Maloney, a Philadelphia philanthropist and papal marquis. Maloney gave $120,000 in 1917 to construct the main building and $100,000 in 1923-24 for what is today the 273 seat Della Ratta Auditorium. The philanthropist said he hoped the building would "help our Catholic young men and women rise to the level of the great opportunities, which our nation offers them. James A. Farrell, president of the United States Steel Corporation, was a featured speaker at the dedication The fieldstone Gothic‐style building was designed by architect Frederick Vernon Murphy who studied at the École nationale supérieure des Beaux-Arts. Upon his return to D.C. from Paris, Murphy introduced himself to the fourth rector of Catholic University, Rev. Thomas Joseph Shahan. The two men, who became great friends, planned the early campus, including Maloney, Father O’Connell, and Gibbons Halls, the John K. Mullen of Denver Memorial Library, and the old gymnasium. As the lab was opened in Washington D.C. in the midst of World War I, the United States Army took over the lab to conduct chemical research. It was here that the chemical weapon lewisite was first invented by Julius Nieuwland and Winford Lee Lewis, with the help of CUA and Army researchers. Maloney Hall underwent renovations and extensions in 1926.
Busch School
Renovation
In 2016, a $47 million renovation was announced, with a lead gift of $15 million coming from Tim Busch. The renovation turned the building into a "Gothic-chic" home for the Busch School of Business which opened in January 2019. Prior to the renovation, the Busch School took up 25% of McMahon Hall, and the School was scattered throughout six buildings on campus with students taking classes in 10. The principal architect was Brian Pilot, a Catholic University alumnus, along with his firm, Studios Architecture. Construction was carried out by Whiting-Turner Construction, and included Chris Saxon, Rachel Hutton, and Nick Carneglia, all of whom are University alumni. It was rededicated in March 2019. The 61,000 square foot building maintains the original Collegiate Gothic features, but modern updates including tiered case study classrooms modeled after those at Harvard Business School and top business schools around the world. The nine "smart" classrooms are tiered to promote class discussions. The building also features nearly 40 offices, conference rooms, touchdown rooms, and glass-walled study pods for students to use on projects that require teamwork and communication.