When I began this series, I said that I’d only seen fountains in plazas or at intersections – meaning I could find all fountains by ensuring I visited every plaza or intersection, rather than traveling the length of every street. In short, I needed to solve the Hamiltonian Path problem, not the Eulerian Path problem. (Interestingly, Euler was inspired by the famous Seven Bridges of Königsberg problem: to devise a walk through the city that would cross each of its seven bridges once and only once. So you might say I am following in Euler’s footsteps. Sort of.)
This week I found two exceptions to my ‘intersection’ theory, including this lovely little fountain in a nook on a tiny back street in Altstadt.
David Kotz 