free to critique Kahn's designs not only as an engineer but also in architectural terms. That could make Kahn feel that his role as architect was being questioned, whereupon Kahn would pointedly remind Komendant that he was an engineer, not an architect. Komendant in turn delighted in needling Kahn about his lack of engineering knowledge. More ominously for their relationship, Komendant "was not above expanding on his share of the credit for shared projects", and Kahn found it difficult to share credit with anyone, two factors that led Komendant to boycott the opening ceremonies for the Kimbell Art Museum, one of Kahn's greatest works and one to which Komendant had contributed significantly. In the early 1960s they collaborated on the National Assembly Building in Dhaka, Bangladesh during its initial design phases, but Komendant walked off the job after a sharp disagreement with Kahn, and they were personally distant for about three years afterwards. During this period, however, they continued to collaborate on the Salk Institute and as members of the architectural faculty at the University of Pennsylvania. Despite their sometimes stormy relationship, they took great pride in the results of their work together. Thomas Leslie, author of Louis I. Kahn: Building Art, Building Science, said, "From his writings, it is painfully obvious that Komendant deeply loved the work he did with Kahn, and that these buildings were, without question, his most widely recognized and honored projects." Kahn acknowledged his debt to Komendant in a handwritten note reproduced in the introduction to Komendant's book 18 years with Architect Louis I. Kahn: "To August whose genius has made my buildings his buildings and are the very ones that have wonder about them." Thomas Leslie described their relationship in these words: "Komendant was neither a form-giver nor a designer, limitations that he reluctantly admitted. Kahn, on the other hand, despite his exquisite attention to detail, did not possess the mathematically analytical mind that had won Komendant acclaim. Each needed the other's sensibility, and their results of their collaborations would be flawlessly integrated meshes of structure and architecture, inconceivable without their stormy partnership's long arguments and impassioned debates about space and structure." Richards Medical Research Laboratories For the eight-story Richards Medical Research Laboratories (1957–1965) in Philadelphia, PA, Komendant engineered the structure of pre-cast and pre-stressed concrete columns, beams and trusses that were trucked in from a factory and fitted together with a crane. Hydraulic