A Hopf link
The tails of these animanls form an Hopf link on the capital of S. Ambrogio church, in Milan.
The image belongs to the sections...:
Photos of the city (From the exhibitions of matematita)
Two components knots (Topology)
Knots in the city and outside the city (Topology)
Pillars, columns and capitals (Anthology of images)
S. Ambrogio (From the exhibitions of matematita)