While the bell tower of the cathedral, known as "the leaning Tower of Pisa", is the most famous image of the city, it is one of many works of art and architecture in the city's , also known, since the 20th century, as (Square of Miracles), to the north of the old town center. The also houses the (the Cathedral), the Baptistry and the (the monumental cemetery). The medieval complex includes the above-mentioned four sacred buildings, the hospital and few palaces. All the complex is kept by the Opera (fabrica ecclesiae) della Primaziale Pisana, an old non profit foundation that has operated since the building of the Cathedral in 1063 to maintain the sacred buildings. The area is framed by medieval walls kept by the municipal administration.
While the bell tower of the cathedral, known as "the leaning Tower of Pisa", is the most famous image of the city it is one of many works of art and architecture in the city's , also known, since the 20th century, as (Square of Miracles), to the north of the old town center. The also houses the (the Cathedral), the Baptistry and the (the monumental cemet,ery). The medieval complex includes the above-mentioned four sacred buildings, the hospital and few palaces. All the complex is kept by the Opera (fabrica ecclesiae) della Primaziale Pisana, an old non profit foundation that has operated since the building of the Cathedral in 1063 to maintain the sacred buildings. The area is framed by medieval walls kept by the municipal administration.