The Renaissance began in Florence, Italy in the 15th century and spread across Europe over the next two centuries. City planning during this period was influenced by a revival of classical Roman styles and an emphasis on order, symmetry, and harmony. Notable examples include Florentine architects like Brunelleschi designing buildings based on mathematical proportions and symmetrical facades, and the multi-century project to rebuild St. Peter's Basilica in Rome according to Renaissance precepts. This new approach to architecture and city planning had a significant impact across Italy and eventually the rest of Europe.