Bili, yunlü,xingti - bisa qiji guangchang jianzhuqun yu xilitang de goucheng fenxi (Proportion, Rhythm, Figure: the complex of Piazza dei Miracoli of Pisa and the analysis of the Baptistery

To the complex of Piazza dei Miracoli of Pisa has been given particular attention by various protagonist of modern architecture (K.F. Schinkel, Le Corbusier, L. I. Kahn) and theorist (A. Bunin, E. Guidoni). In general it has been considered as a sample of coordination of different buildings and proportion of parts and whole (group design). This article then exemplifies and illustrates the principle of modular coordination between Duomo and Baptistery, and furthermore, the detailed composition of the volume and rythm of the Baptistery. The analysis of the baptistery's rithm reveals the composition methodology of the building based on the medieval Western harmonic rules and also the proportional coordination of the groupage.