A bearded man and an angel stand at an altar under a domed structure, surrounded by figures.
An arched painting, taller than it is wide, shows an elaborate architectural setting. The upper portion is dominated by a complex structure featuring multiple domes. A large central reddish-brown dome with an orange finial is flanked by two smaller, similar domes, with two more visible below them, creating a tiered effect. The architecture is rendered in shades of light brown, grey, and blue, with intricate details and arched windows against a dark blue background. Below the domes, a grand, open-sided structure with arches and four white fluted columns frames the central figures. In the center, a bearded man with a halo, wearing a light blue tunic and a pink robe, stands to the left of a white altar. He holds a book or tablet in his left hand and gestures towards the altar with his right. Opposite him, to the right of the altar, an angel with a halo and wings, dressed in a light purple tunic and an orange robe, holds a small object over the altar with both hands. The altar is white with arched openings on its front. Behind the altar, a tall, narrow, reddish-brown structure with intricate details rises towards the ceiling. The floor beneath the figures is a patterned tile in dark and light squares. On either side of the central figures, groups of people are gathered, looking towards the altar. On the left, several figures are visible, mostly from the waist up, dressed in various colored robes, including blue and brown. On the right, a similar group of figures, also in robes of blue, orange, and brown, observe the scene. Their faces are rendered with individual features, and some have light brown or dark hair.