Garden spider. Not sure of species.
Argiope trifasciata, the Banded Garden Spider.
maybe Argiope bruennichi.
The banding pattern being in 3s sort of sells it as “Tri”-fasciata 😉
Compare to http://nathistoc.bio.uci.edu/spiders/Argiope%20trifasciata.htm
Thanks for the tip! I was going by the waviness of the lines, but both species can be wavy. I misinterpreted the species name as meaning layers of three colors, I totally missed the obvious meaning.