The Oxford Mathematical Institute has one just outside the entrance. We also have Penrose himself though :P More info: https://www.maths.ox.ac.uk/about-us/lif

The Oxford Mathematical Institute has one just outside the entrance. We also have Penrose himself though :P More info: https://www.maths.ox.ac.uk/about-us/life-oxford-mathematics/oxford-mathematics-alphabet/aperiodic-tiles https://www.maths.ox.ac.uk/about-us/life-oxford-mathematics/... http://www.maths.ox.ac.uk/node/865 http://www.maths.ox.ac.uk/node/865