The Great Globe at Swanage is one of the largest stone spheres in the world. The Great Globe is constructed of Portland stone. It weighs about 40 tonnes and is 3 metres (10 ft.) in diameter. The Globe, which is made of Portland stone, consists of 15 segments, with four stones for each of the lower three courses and three in the top-most course, the segments connected by granite dowels. Its surface is carved in detail and lettered to show the continents, oceans and certain more specific areas of the world. In the year of its creation, it was erected by W.M. Hardy upon a platform chopped 136 feet (41 m) above sea level into the solid rock of the hill. Around the Globe is a set of stone plaques carved with quotations from English and Roman poets and the Bible, as well as facts about the natural world. These were not completed until 1891.