Rustem Pasha Mosque, Istanbul Jean-Léon Gérôme (1824-1904)

The picture has something of this: people, spirituality, prayer, group, position, worship, architecture, god, church, castle, temple, woman, mosaic, man, daylight.
Perhaps it’s a painting of a group of people sitting on a rug in a room with blue walls and a staircase leading up to the top of a set of stairs.