Ytdyklly

So, this extraordinary claim has been getting a lot of publicity lately:

https://www.youtube.com/watch?v=GQKrfGCd7I8

They say a wall is medieval, well so is a wheel. A wheel is older than a wall. And I looked, and every car out there, even the really expensive ones the secret service use. And believe me, they are expensive. I said "do they all have wheels?". "Yes". "Oh, I thought it was medieval." The wheel is older than the wall, you know that?

Donald Trump, 45th President of the United States of America

I'm pretty sure I know about this, but was the wall invented before, or after the wheel?

No, walls predate wheels by several millenia.

The invention of the wheel is generally placed at around 3500-4500 BCE. However walls were famously built around the town of Jericho in 8000-9000BCE.

More information can be found here: https://www.usatoday.com/story/news/politics/2019/01/10/president-trump-is-wheel-older-than-wall/2539339002/

I've upvoted DJClayworth's answer because I think it's better than the one I'm supplying. And, his answer actually answers the question.

But I'm leaving an answer of my own as a frame challenge. I do think that the question might be overly concrete, but only because it's responding to an overly-literal definition of "medieval" in the opening quote from the YouTube video. Yes, medieval can mean "from to the middle ages." But it ALSO means "old fashioned," "unenlightened," "primitive," "cruel," "antiquated," or merely "in the style of the middle ages." (See https://www.merriam-webster.com/dictionary/medieval; https://www.dictionary.com/browse/medieval; https://www.thefreedictionary.com/medieval).

Because this question was asked on "Skeptics" Stack Exchange (rather than "History" Stack Exchange), and it because it was asked in the context of a particular quote, the original post might be seen as an inquiry into the validity of the premises of the quote. I'm providing this answer in case it may also contribute to an understanding of the validity of the premises of the quote.

If the critics of the wall were using "medieval" to refer to "the age of the technology," then the question of which came first, the wall or the wheel, is relevant to the integrity of the quote's argument. But that seems doubtful to me since walls were in use long before the Middle Ages. But if they were using "medieval" to refer to aesthetics reminiscent of the middle ages, then whether the wall of the wheel came first becomes more of a red herring.