Founded in 1889 by Mr. Edward Stotz, MacLachlan, Cornelius & Filoni was the first architectural firm in Pittsburgh. Today, we provide a full range of services including architectural design, master planning, programming, interior design, sustainable design, and construction administration services.Through our vast experience and expertise, we have gained a national reputation for our designs and aesthetic. We have worked with clients across the United States and abroad.The vitality of our firm is maintained by practicing architecture and planning with a diverse clientele. Some of the markets we serve include higher education, healthcare, athletic/recreational facilities, performing arts, commercial, and historical / adaptive restoration.