The saint stands in profile at the steps of an altar in front of a highly-developed architectural background. His gaze diverted upward in astonishment, he experiences the manifestation of the Mother of God and her Child, who appear to float in the interior of the church on a cloud, accompanied by angels. The rendering of the material of the robes is particularly impressive, as is the mist-like quality of the cloud, which almost turns the vision into an actual happening.