The current urban pattern and architecture of Pienza was basically dictated by Pope Pius II because this was his home town, and he had asked two architects from Florence to plan the construction as he wished. Pienza was thus called the “touchstone of Renaissance urban life” and was declared a World Heritage Site in 1996. In our visitors' view, there may not be so many gates - only one small, not spacious street, stretched out to the winding alleys, the center is the church and square, and two gates at both ends of the street mark the boundaries of the town. Major buildings such as churches and the pope's summer palace are built of sandstone, and most of the houses in the alleys are made of red brick. Every household is decorated with flowers on windowsills, balconies and even walls, and the door frames are built with flower bridges, and the fragrance of flowers is filled with air.