Mataram Sultanate
Mataram Sultanate was the last major native polity in Java prior the kingdom broke into of courts of Surakarta and Yogyakarta, and the princedom of Mangkunegaran and Pakualaman, and prior the island was completely ruled by the Dutch. For some Central Javanese, especially those hailed from Yogyakarta and Surakarta city, the Mataram Sultanate, especially Sultan Agung's era, was remembered with pride as a glorious past, as Mataram become the regional hegemon after Majapahit, almost completely unified Java island, and almost succeed to drive the Dutch out of Java. However, for those of former Mataram's rivals or vassals; East Javanese Surabayan, Madurese and Blambangan, also Priangan and Cirebon of West Java, Mataram era is remembered as the era of Central Javanese overlordship over them, marked with authoritarianism and arbitrariness of feudal Javanese regime. In the future this would lead to interregional Madura - Central Java animosity. Also to some degree, Priangan–Mataraman rivalry. Within Mataraman realm, the disintegration of Mataram Sultanate into several competing "Keratons", also would lead to Surakarta–Yogyakarta rivalry.