RÜSTEM PASHA MOSQUE, ISTANBUL (sketch) Jean-Léon Gérôme (1824-1904)

The picture has something of this: architecture, church, arch, mosaic, ancient, building, ornate, cathedral, culture, niche, grave, Gothic, decoration.
Perhaps it’s a painting of a blue and white building with a staircase leading up to the top of the building and a window on the side.