Carles Vallhonrat, lecturer with the rank of professor in the School of Architecture, died Feb. 21 in Haverford, Pa. He was 89. Vallhonrat joined the faculty in 1972 and retired in 2001. Since 1975, he had been principal of C.E. Vallhonrat, Architect, in Philadelphia. He wrote about tectonics and Austrian architect and designer Josef Hoffman. Vallhonrat was the founder of the Louis I. Kahn Archive in Philadelphia and narrated the film Spent Light: Louis Kahn and the Salk Institute.