A chaotic pendulum At the last day of a short stay in the UK I walked the city center of Bristol. Interested in architecture I entered the St. Mary Redcliffe church. To my surprise inside a so called "chaotic pendulum" was in operation. I watched the pendulum swinging for quite some time but could not see any regularity. The movement was totally chaotic. Below is the text next to the pendulum: A lesson in modesty. and finally the brochure of this beautiful church: