This cloister was built between 1308-1311 during the reign of D. Dinis and is the work of two successive masters, Domingo Domingues and Mestre Diogo. An inscription in front of the Chapter Room, indicates the year and the day it started. This cloister must have replaced another one from the time of the foundation, with a simpler structure and a shorter height, as evidenced by the traces in the corbels of the wall on the side of the Church of the Chapter. At the end of the reign of King Manuel I in 1520, the second floor of the cloister was added by Nicolau de Chanterene. This cloister also known as the cloister of silence, because it is not allowed to speak. Ailás this was a general rule of the cistercian monks, the vow of silence, in case of emergency they communicated by gestures, and could only speak with the prior, on a certain day.