Mr. Weixler's role in the firm, based in Ardmore, was to listen carefully to each client's vision for a particular space, and to translate that vision into spatial and technical language for implementation by the firm.
"Steven Weixler was one of the most intelligent people I have ever met," Luzi said. "He was able to process very complex design problems and quickly come up with effective, simple, and yet brilliant design solutions."
Mr. Weixler's influence can be seen locally in the architectural detailing of historical restorations, in the integration of advanced electronics into home theaters, and in imaginative use of lighting.
"Steve loved Philadelphia," Peterson said. "He was passionate about the adaptive reuse of historic structures without destroying their innate character."
His work garnered several top design awards. Articles about it were featured in six coffee-table books and in Architectural Digest, Florida Design, and House Beautiful. He also lectured widely.
Peterson said Mr. Weixler was active in civic affairs. The chair of the Zoning and Historic Preservation Committee of the Society Hill Civic Association, he later became the group's president.
Mr. Weixler also worked toward the "careful and sensitive development of the Delaware waterfront," Peterson said. He was founding chairman of the Central Delaware Advocacy Group, a coalition of 15 area civic associations.
He was a member of the International Association of Lighting Designers, Pennsylvania East Chapter of the American Society of Interior Designers, and the Athenaeum of Philadelphia. He was a licensed pilot and an expert yachtsman.
"Steve was never happier than when sailing on the Chesapeake Bay," Peterson said. "Many weekends, we would drive to the Eastern Shore with friends, load up provisions, and sail off into the sunset."
Mr. Weixler is survived by three brothers. A memorial service was Saturday, May 24.
Donations may be made to Calcutta House, 1601 W. Girard Ave., Philadelphia 19130.