Owo has the largest palace in Africa which was declared a national monument by the federal government. The Olowo Palace had as many as 100 courtyards on 180 acres of land approximately 8 percent of the land mass of Owo. Each courtyard had a specific function and was dedicated to a particular deity. The largest, said to have been twice the size of an American football field, was used for public assemblies and festivals. Some courtyards were paved with quartz pebbles or broken pottery. Pillars supporting the veranda roofs were carved with statues of the king mounted on a horse or shown with his senior wife.