Church
San Nicola is mentioned for the first time, together with the annexed convent, in 1097. In 1297-1313 the Augustinians enlarged it, perhaps under design by Giovanni Pisano . In the 17th century the edifice was restored with the addition of altars and the Sacrament Chapel by Matteo Nigetti (1614).
The façade features pilaster strips, blind arches and lozenges, and is decorated with 12th century intarsia.
The interior houses the panels of Madonna with Child (by Matteo Traini, 14th century) and of St. Nicholas Saving Pisa from the Plague (15th century), canvases by Giovanni Stefano Marucelli and Giovanni Biliverti, a Crucifix by Giovanni Pisano, a Madonna with Child by Nino Pisano and an Annunciation by Francesco di Valdambrino.
A covered passage connects the church to the Torre De Cantone and, from it, to the Palazzo delle Vedove: it was used by the Medici gentlewoman residing in the latter to reach the church without walking in the streets.