The friars could enter the ambulatory directly from the cloisters to the south, and they would have regularly visited the eastern portion of the church beyond the rood screen and the interior of the choir enclosure in order to celebrate the numerous daily ofrices held at the high altar and, presumably, in the radial chapels.
15 The estimated height of the inner choir enclosure's western face and side walls is calculated from the measurements (7 pedem = 2.43 m) of a choir planned for the Paduan Carmelites in 1383, a structure that was to be based on the Santo's choir.