San Nicola - church in Pisa, the first mention of which relates to 1097. Together with her in the same source mentioned and located next to the monastery. In 1297-1313, the monks of the Order of avgustinntsev expanded the church, possibly by the architect Giovanni Pisano. In the 17th century the building of San Nicola was restored by adding a new altar and a chapel of the Blessed Sacrament. The last raised in 1614 by Matteo Nidzhetti.

The facade of the church is decorated with pilasters without capitals, blind arches and diamond-shaped figures. Here you can see the wooden inlays of the 12th century. Inside the temple are kept panels with images of the Madonna and Child (14th century), the work of Matteo Traini and St. Nicholas, saving Pisa from the plague (15th century), canvases Giovanni Stefano Maruchelli and Giovanni Biliverti, "The Crucifixion" by Giovanni Pisano, another Madonna and Child, this time made by Nino Pisano, and "Annunciation" by Francesco di Valdambrino.

Indoor passage connects the church with the tower Torre de Canton and the Palazzo della Vedova - with the help of his great ladies of the Medici family, who lived in the palace, could enter the church without going outside. The octagonal bell tower, the second most popular after the famous Pisa leaning tower, most likely was built in 1170. It is not known who was its architect, but there is reason to believe that over the bell tower worked Diotisalvi. Initially, the bell tower was separated from adjacent buildings to it. It is also slightly tilted - it is the foundation below the current street level. The lower part of the bell tower is decorated with blind arches with diamond-shaped figures. Effect of multi-colored created for use in the construction of stones from different locations.

A few words should be said about the above mentioned Palazzo della Vedova, standing next to the church of San Nicola. The name of the palace, built in the 12-14 centuries, translated as Widow's Palace. His appearance is still visible medieval features such as marble arched windows. In the 16th century Palazzo has been significantly modified and was used as a "residence of the" widows of the Medici family.