Gilanshah (Persian: ïÃÂÃÂçÃÂôçÃÂ) was the last ruler of the Ziyarid dynasty from to 1090. He was the son and successor of Keikavus. Little is known about Gilanshah; his kingdom was invaded by the Nizari Ismaili state in 1090, ending Ziyarid rule in Tabaristan.