Complex tiers of relationships between kings and kingdoms existed. Nubian pyramids are pyramids that were built by the rulers of the ancient Kushite kingdoms. The Nilfgaard Empire occupies most of the area south of the Northern Kingdoms. The area underwent several name changes with successive kingdoms and dynasties. This early period was followed by the art styles of various Korean kingdoms and dynasties. Many formerly powerful kingdoms and peoples disappeared. Armies from other Rajput kingdoms, including Mewar, assisted him. Epigraphic sources place the capitals of many ancient kingdoms in Guwahati. Numerous small Frankish petty kingdoms existed during the 5th century. They imposed power over many other post-Roman kingdoms and Germanic peoples. Ararat was the geographical center of ancient Armenian kingdoms. Antoninus was the last Roman Emperor recognised by the Indian Kingdoms. The regions had many small independent kingdoms. Northern England was a focal point for fighting during the Wars of the Three Kingdoms. Links between Rome and the Indo-Parthian kingdoms existed.