Like Newton's Principia (from 1684) looks like Norse mythology? It is still a valid model except for a few minor errors, and almost halfway to 1000 years. Bette

Like Newton's Principia (from 1684) looks like Norse mythology? It is still a valid model except for a few minor errors, and almost halfway to 1000 years. Better yet might be Greek mathematics, e.g. Euclid's Elements which is more than 2300 years old now. The language is different of course, but the content itself reads a lot like a good proof-oriented geometry textbook.