A Solomon's knot
In Trieste, on the facade of a synagogue, we can see the representation of a knot made of two doubly-tied components (the Solomon's knot); it is a torus knot of type (2,4); see also a detail.
© matematita
The image belongs to the sections...:
Decorations of walls and façades (Anthology of images)
Knots in the city and outside the city (Topology)