This paper is part of a larger series, attempting to align Louis Kahn's ‘form and design’ theory with Platonism. 1 One obstacle to this alignment is the commonly held view that Kalm drew on historic precedents when conceiving his fundamental planning strategies, or die ‘form’ of his buildings, since Plato would have architects copy the Forms, or Ideas, directly. The opinions of the ‘source-hunters’ are reviewed, but found to contradict much of what Kahn said, as well as die opinions ofodier scholars and associates of Kahn's. The weight of the latter views casts doubt on those of die ‘source-hunters’, leaving open the possibility that Kahn drew on Forms directly, as Plato would have ‘craftsmen’ do.