That could be true for some of the stone-built cathedrals, but a lot of buildings tourists like aren't particularly difficult to build or maintain, they're just

That could be true for some of the stone-built cathedrals, but a lot of buildings tourists like aren't particularly difficult to build or maintain, they're just not done due to cost. These buildings could also be imitated or "quoted" for a fraction of the cost of the source buildings, but they're just not done since development is really only done to turn a buck, whereas in the past a lot of people developed buildings out of a sense of grandness or splendor meant to inspire and show off.