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, parks and recreational facilities, commercial and housing, historical and adaptive restoration, as well as developers and community groups.