Atkin Olshin Schade Architects is an architecture and planning firm located in Philadelphia, Pennsylvania. Founded in Philadelphia in 1979, the firm has worked with a wide range of clients throughout the country on a variety of projects that have won national, state, and local design and preservation awards. Over the years, the practice has evolved to include a full range of public, private and institutional building projects. The firm has three principals, one associate principal, two associates; and a total staff of twenty people.