Anne Tyng, 91, groundbreaking architect

Anne Tyng, a pioneering woman architect whose ideas about geometry influenced Louis Kahn's buildings and who later had a child with him, died Tuesday, Dec. 27, in Greenbrae, Calif. She was 91, said her daughter, Alexandra, who lives outside Philadelphia.

Although Ms. Tyng was among the first group of women to graduate from Harvard University's architecture school in 1944, she struggled her entire career to be taken seriously. Firms would not hire her because she was a woman.

During her licensing exam in 1949, one of the proctors turned his back on her and refused to administer the test. She was the only female architect in the United States to seek registration that year, she recalled in an interview with The Inquirer.

Ms. Tyng eventually landed a job in Kahn's Center City office. During a 15-year relationship that was both professional and romantic, she helped him produce his pathbreaking early buildings, including the Trenton Bathhouse and the Yale Art Gallery. Yet until recently, she received little credit for those iconic projects.

"She was a victim of her time, being female, being beautiful. That was a pretty hard legacy to carry," said Carter Wiseman, author of the biography Louis I. Kahn: Beyond Time and Style. "She was constantly swimming upstream."

Kahn was married when he became involved with Ms. Tyng. Her pregnancy in 1953 was considered so scandalous that Kahn sent her to Rome. Their difficult relationship is captured in a collection of letters that Ms. Tyng published in 1997. It included only letters she received from Kahn, because he destroyed the replies.

Ms. Tyng's background was nearly the opposite of Kahn's impoverished immigrant experience. She was descended from an elite Boston family, and a portrait of a 19th-century ancestor, Ann Tyng, hangs in Boston's Museum of Fine Arts. In the early 20th century, her parents went to China as missionaries, and Ms. Tyng was born in Lushan, Jiangxi province, in 1920.

Despite the obstacles Ms. Tyng faced as a woman in a male field, she was determined to forge a career in architecture. She made her way to Philadelphia in 1945 and was hired by Stonorov & Kahn, one of the city's most innovative architectural practices. When Kahn struck out on his own, she followed him.

At the time, Kahn's designs adhered to strict modernist tenets about form and function. Ms. Tyng, who was fascinated by complex shapes called Platonic solids, pressed Kahn to incorporate those geometric shapes into the firm's work.