Abstract: A construction set of modular pieces for constructing a scale model of an arrangement of contemporary buildings, such as a complex or cluster of high and low rise buildings located on common plaza areas, is made of several kinds of modular plaza blocks, building blocks, joint pieces for connecting the plaza blocks together, inside rail pieces for providing ridges on the top of the plaza blocks for connecting the building blocks thereto and outside or inside rail pieces for providing railings where desired on a plaza; all of the plaza blocks, building blocks, connecting pieces and rail pieces having dimensions of width and length that are whole number (integer) multiples of the same dimension D, whereby a variety of arrangements of plaza blocks, buildings blocks, and plaza railings may be constructed from a set of such blocks and pieces.