PHILADELPHIA -- Architect Marshall D. Meyers, a Fellow of the American Institute of Architects who spent his professional life in Philadelphia, died August 12 in Pasadena, Calif. He was 70. Meyers was known for his exceptional contributions to the art and craft of architecture, and is internationally recognized for his innovative contributions to Philadelphia architect Louis I. Kahn most significant work During Meyers1957-73 association with Kahn, he played a key role in many landmark projects including the Alfred Newton Richards Medical Research Building at the University of Pennsylvania; the Kimbell Museum in Fort Worth; the Salk Institute for Biological Studies in La Jolla, Calif.; and the unbuilt Memorial to the Six Million Jewish Martyrs in New York City Battery Park.

Meyers received his Master of Architecture degree from Yale University in 1957, after graduating from Pratt Institute in 1953. He taught at Penn as a lecturer and design critic in Penn architecture program from 1979 to 1988 and also served as an adjunct professor of architecture at Temple University from 1985 to 1990.

In his role as Kahn project architect for the Kimbell Art Museum, Meyers originated the novel transparent daylight reflector which, taken together with his proposal for the cycloid-shaped roof system, introduced a totally new quality of controlled ambient lighting in museums. The success of this innovation inspired a renewed interest in the use of daylighting in art museums and influenced art museum design thereafter.

In completing the design and construction of the Yale Center for British Art after Kahn death in 1974, Meyers resolved the daylight-diffusion system in a way that has influenced a new generation of museum daylighting technology. In recognition of this accomplishment, Meyers won the National Honor Award of the American Institute of Architects for Excellence in Design in 1978.

Meyers served as a key consultant for the retrospective exhibition "Louis I. Kahn: In the Realm of Architecture," organized by the Museum of Contemporary Art, Los Angeles, which opened its seven-museum world tour at the Philadelphia Museum of Art in October 1991. In this role, he brought to the study of Kahn work an uncompromising honesty, maintaining the highest standards of accuracy in the documentation of Kahn work and philosophy while never losing sight of the inspirational qualities of Kahn buildings.

As an independent practitioner, Meyers designed the renovations to the Richards Medical Building, as well as the display furniture in the main entrance gallery of the Kimbell. With the support of the Aga Khan Foundation, Meyers undertook the schematic design of a new mosque in British Columbia. He also designed the relocated Bookshop at the Yale Center for British Art.

Meyers served as senior associate for Bower Lewis Thrower/Architects in Philadelphia from 1985 to 1992. He was the project architect for the restoration of the Cone Wing at the Baltimore Museum of Art, for the Eugene Ormandy Memorial Listening Center at Penn Van Pelt Library, for the Woodmere Art Gallery and for the preliminary design of the Terra Museum of American Art in Giverny, France.

Meyers and his wife Ann moved to Pasadena in 1996, where he joined the office of Perkins and Will as a senior associate in 1999.

Throughout his life, Meyers lectured and wrote nationally and internationally on Kahn. His essays and articles on Kahn were published in major architectural journals and in Garland Publishing Company seven-volume illustrated catalog of The Louis I. Kahn Archive.

A talented architectural photographer, Meyersworks were exhibited in shows at The Museum of Modern Art, New York, and published in museum monographs, exhibition catalogues, magazines, journals and books.

Meyersprofessional work was exhibited in "An Ideology for Making Architecture" at Yale University in 1981 and in "Process in Architecture" at the Massachusetts Institute of Technology Hayden Gallery in 1979. In 1994, he was inducted into the College of Fellows of the American Institute of Architects.

Meyers is survived by his wife, daughter Pamela and two granddaughters. Interment will be at Montefiore Cemetery in Philadelphia. Memorial services in Philadelphia and Pasadena are to be announced.

Memorial contributions may be sent to The Architectural Archives, Graduate School of Fine Arts, University of Pennsylvania, 102 Meyerson Hall, Philadelphia, Pa. 19104-6311, marked to the attention of Julia Moore Converse.