 Throughout the 16th and 17th centuries, the sultanate thrived and became a major regional centre of trade and commerce, as well as a prominent centre of Islamic learning.The sultanate split into three royal houses in 1677, and a fourth split off in 1807, each with their own separate lines of descent and kratons; Keraton Kasepuhan, Kraton Kanoman, Keraton Kacirebonan, and Keraton Keprabonan.Today they remain, performing ceremonial duties.