There are only 15 true load-bearing stone triumphal arches the world. Rome built its last in 360 AD and another wasn't built for 1,000 years. If triumphal arches are a sign of a civilization's peak, then Rome peaked in 117 AD, France in 1806, Prussia 1791, Russia 1814, Britain 1830, and the United States in 1915. America built three in New York. It was the rise of the American Century. Then we stopped. 111 years ago. Here's why: True triumphal arches are hard on purpose. Purely symbolic, they are a test of will to see if you can pull them off. Take the Arch de Triomphe. Napoleon commissioned it in 1806. It took 30 years to build. Four monarchs and three architects passed before it was finished. Napoleon died in 1821 and never saw it completed. The arch requires load-bearing stone. Typically limestone or granite which are easiest to cut. To build the arch, Napoleon opened a limestone quarry 100km south of Paris. It required 20,000 blocks, each weighing a ton to be extracted with hand chisels. Each block must be chiseled to precision... by hand. A mason, who trained for 20 years, used mallets, chisels, and rasps to shape each block to millimeter tolerance. An arch, which is a physics trick and works by compression, will fail if a stone is just a few millimeters off. The force fails to flow evenly, pressure concentrates to a point, a stone cracks, and it fails. America could still build a real one. The engineering exists. The stone exists. But we don't want open a quarry for a single monument. Stake 20,00 blocks by hand. We don't want to wait three decades while a project outlives the presidency that started it. The Memorial Circle arch will cost $100M. It will be made of reinforced concrete and steel. Is it emblematic of the United States today to build a symbolic triumphal arch, representing a 2,000-year-old test of will, only to fake it with steel rods and concrete?