Klerisso, Charles-Louis – Sketch for painting the east wall of room-ruins Hermitage ~ part 06

The picture has something of this: architecture, building, ancient, column, monument, arch, sculpture, landmark, stone, castle, Gothic, historic, culture, wall.
Perhaps it’s a drawing of a building that has a lot of columns and a ceiling with a cross on top of it and a staircase leading up to the top of the building.