“But inspiration? - That's when you come home from abroad and are asked: Well, have you found inspiration? - and fortunately you haven't. But the impressions sink in, of course, and may emerge later: None of us has invented the house that was done many thousands of years ago.”
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In addressing a task, one almost always has several possible options, sometimes only a few, and they may all be practical and functional. But they lack the aesthetic aspect that raises it to architecture.
I don't see that any buildings should be excluded from the term architecture, as long as they are done properly.
When I travel, I draw and paint sketches which is great fun. And as long as you are fully aware that it has nothing to do with actual art, I think that's all right.
If a building becomes architecture, then it is art.