In Escher's drawing, it is not clear whether the water is flowing away form the viewer or towards the viewer. In many ways, it seems to contradict the laws of physics. Moreover, the corner points of the cube above the structure are connected in such a way that it is not clear which points are the farthest and which are the closest to the viewer. In these ways, the artist plays with our perception of depth.
Answer: Classical Era (latter half of 1700s)
I feel like its more appropriate to leave artworks in a museum because if you leave them in their native settings it can possibly be destroyed or stolen. if you leave them in a museum it can be shown by lots of people who loved artwork and will pay billions to get one.