In the 14th and 15th centuries which were before the opening of new maritime route,the international economic and political pattern had undergone drastic changes,and connections and exchanges greatly enhanced between the East and the West of the Eurasian world,which profoundly affected the regions and cities along the route,including the Tuscany region and Florence in the hinterland of Italy,and promoted their rapid development.The strengthening of maritime trade routes between the Eastern Mediterranean and the India Ocean led to a shift in the international trade from land to sea and the emergence of a large number of successful business families.This new group of families which developed through the international trade accelerated the rise of Florence,actively participating in the politics and promoting the transformation from the city-state republic to the family-led politics.Furthermore,by using the transformation of the urban space to highlight their identities,they differentiated themselves from the old families and competed with the common class.More specifically,they enhanced the family status in Florence through building palazzo in the city,patronising culture and controlling neighbourhoods.Those measures not only strengthened the political power of the families in the city,which made the Florentine republican system more elitist,but also reshaped the spatial structure of the city and promoted the development of art,which stimulated the rise of the Renaissance in Italy.