[steponlego]

Many people wrote about this technique, the earliest known person to describe it was Cicero.

[nextaccountic]

https://artofmemory.com/blog/how-to-build-a-memory-palace/ says "According to Roman legend, the memory palace technique was invented by Simonides of Ceos about 2,500 years ago" but Cicero died 2065 years ago, so, close enough?

[steponlego]

What's the source of the Roman legend? IIRC it's Cicero.