For this production, the actresses held a kind of "internship" in Vinhais, where they spent a few months living with the local population and learning their trades and ways of life to create their characters. Also the pilgrimage that is portrayed in the film is real. The actresses completed, like any pilgrim, the journey on foot from Trás-os-Montes to the sanctuary, in different stages: the first in 2014, in preparation and with other groups of pilgrims, then in 2015, with the actresses already forming a group, and in 2016 for the film.
