Construction of the baroque courtyards required staircases which would connect both floors of the building. Each front cloister had its own, built following the medieval model and devoid of interest, except for the doorway. The wooden rear arcades were given similar features. However, when they were rebuilt in stone, it was decided to create a single staircase next to the sacristy.

The plan was realized between 1760 and 1766, using the double-flight model characteristic of Galician baroque architecture. Along the last flight, four stone busts representing the seasons crown the framework. This corner is known as the “Bethlehem Staircase” because it connected to the Virgin of Bethlehem Room, the hospital’s delivery room, located on the mezzanine.