San Nicola Church in Pisa, the first mention of which relates to 1097. With her in the same source is referred to and located near the monastery. In 1297-1313 year monks from the order of Augustine expanded the Church, possibly by the architect Giovanni Pisano. In the 17th century the building of San Nicola was restored by adding new altars and built the chapel of the blessed sacrament. Last in 1614 built Matteo Nicette.

The Church's facade is decorated with pilasters without capitals, blind arches and diamond-shaped figures. Here you can see the wooden inlay of the 12th century. Inside the temple are stored 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 Marucelli and Giovanni Biliverti, "the Crucifixion" by Giovanni Pisano, another Madonna and Child, this time made by Nino Pisano, and "the Annunciation" Francesco di Valdambrini.

A covered passage connects the Church with the tower Torre de Cantone and Palazzo delle Vedove – this is a noblewoman of the Medici, who lived in the Palace, could get into the Church, without going outside. Octagonal bell tower, the second in popularity after the famous Pisa Leaning Tower, was probably built in 1170. It is not known who was its architect, but there is reason to believe that bell tower over worked Diotisalvi. Originally the bell tower was separated from near her buildings. She is also a bit tilted – its Foundation is below the modern street level. The lower part of the bell tower is decorated with blind arches with diamond-shaped figures. A great effect is created due to the construction of stones from different places.

A few words should be said about the aforementioned Palazzo delle Vedove beside the Church of San Nicola. The name of the Palace built in 12-14 centuries, translated as Widow's Palace. Its 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" widows of the Medici.