The undergraduate courses in Theoretical physics at the ETH are done with books (e.g. Goldstein: Classical Mechanics, Jackson: Eletrodynamics...) which are PhD Level in the US.
I think that is true for most German speaking universities. I know for a fact that both Unis in Munich and Heidelberg basically teach PhD level courses in Undergrad in the sense that there is no Graduate Electrodynamics and Undergraduate Electrodynsmics just one experimental and one theoretical course in which Jackson is typically one of the references, the same is true for QM etc