The Art Institute of Chicago recently featured on social media a painting by Hubert Robert:

Among the many worthwhile works on the second floor of the Art Institute are these four works in one room. I have always enjoyed them. Building off yesterday’s post about how today’s buildings could become tomorrow’s fossils, these paintings romanticize ruins from past civilizations. Imagine walking through such structures. There may have been centuries when people could wander through such ruins in Rome, Greece, Egypt, and more. Today, such a site would be hard to find as many ruins are swarming with tourists.
What always impressed me about these paintings was the scale of the buildings. As the social media post notes, the people at the bottom are very small. The buildings are massive and impressive. They connote great civilization and activity. Imagine this building above with a full vaulted ceiling and full of people. The buildings have lived on even as the individual leaders and residents changed.
The Diderot quote above is an interesting one. These buildings are falling apart and time will conquer them. At some point, the pillars will fall, the arches will be no more, and the scene will look very different. But, rulers and leaders construct such buildings in the first place so that the structures outlive them. They will not last forever, but even as ruins or remains in the ground they can still attest to a past era.