Authors have been conducting the field research under the title ‘Origin, Transformation, Alteration and Conservation of Urban Space of Colonial cities' since 1999. This paper discusses the characteristics of the Spanish colonial cities established in Cuba focusing on Cárdenas as a typical urban model. This study has been accomplished based on the analysis of old maps corresponding to colonial Spanish period and field survey.
Cárdenas was planned by Andrés José del Portillo who introduced the very simple gridiron system based on the single plot of same size in the late 1820's. and maintained the original structure. We clarified the original model and transformation of Cárdenas based on the analysis of block size, block division, and plot subdivision.