From Wikipedia: https://en.wikipedia.org/wiki/Broken_Chair

Broken Chair is a monumental sculpture in wood designed by Swiss artist Daniel Berset, and constructed by carpenter Louis Genève. It is constructed of 5.5 tons of wood and is 12 metres (39 feet) high. It depicts a giant chair with a broken leg and stands across the street from the Palace of Nations, in Geneva.[3] It symbolises opposition to land mines and cluster bombs, and acts as a reminder to politicians and diplomats visiting Geneva.