We can find this braid with two threads, identical, both in a bretzel and in the fountain near the fish market, in Streiter street, in Bolzano.
This image has been used in one of the ten maths signposts of the project MIC "Maths in the City", in Bolzano.
immagine di Ester Dalvit
The image belongs to the sections...:
Some images of the maths signposts (Exhibitions with matematita)