The Early Modern Times in Romania started after the death of Michael the Brave, who ruled in a personal union, Wallachia, Transylvania and Moldavia – three principalities in the lands that now form Romania – for three months, in 1600. The three principalities were subjected to the Ottoman Empire, and paid a yearly tribute to the Ottoman Sultans, but they preserved their internal autonomy. In contrast, Dobruja and the Banat were fully incorporated into the Ottoman Empire.
The Orthodox princes of Wallachia and Moldavia ruled their realms with absolute power, but the boyars took control of state administration in the 1660s and 1670s. The growing influence of Greeks (who administered state revenues and seized landed estates) caused bitter conflicts in both principalities. Due to extensive taxation, the peasants often rebelled against their lords. The long reign of Matthew Basarab in Wallachia and of Vasile Lupu in Moldavia contributed to the development of local economy (especially mining and commerce). Most princes of Wallachia and Moldavia also paid tribute to the princes of Transylvania. The latter administered their realm in cooperation with the Diet, composed of the representatives of the Hungarian noblemen, the Transylvanian Saxons and the Székelys and of delegates appointed by the monarchs. In the principality, Catholicism, Lutheranism, Calvinism, and Unitarianism enjoyed an official status. Romanians had no representatives in the Diet and their Orthodox religion was only tolerated. The three outstanding princes – the Calvinist Stephen Bocskai, Gabriel Bethlen, and George I Rákóczi – expanded their countries and defended the liberties of the Estates in Royal Hungary against the Habsburgs in the first half of the 17th century.