Abstract
Although they diverge in the cultures they represent, Sinan and Palladio converge not only by being contemporaneous, but also in the use of a rudimentary planning tool that seems to comply with a set of their designs. This article explores the applicability of the nine-square grid to two notable precedents that are selected from the works of Sinan and Palladio. The two designated designs are visually, morphologically, and mathematically analyzed and compared in terms of their vocabulary elements, proportions, and compositions. Furthermore, they are mapped according to their architectural assignments to basic grid units as well as the transformations of their regulatory lines into design configurations. Commonalities and differences of various aspects in the two designs are reported and discussed.