Feudal system brought duality to authority (duality between aristocracy and church). In the end of middle ages, the popes gained importance on all issues: social, political and architectural. I mean, in this period , men of the god had enlarged power on management to affect all economy, education, design of cities and building etc. So they built grand churches in the center of cities. Large and high churches was build in city centers to show the power of god and show the strength of Christianity. By building cathedrals, they ignored planning of the city as whole. However, they reorganized streets, residential and urban areas according to the location of churches. Therefore, they created a main axis that stretch aloung the churches.