Principality of Halych-Volhynia

The Principality of Halych-Volhynia, also rendered the Kingdom of Galicia-Volhynia, was a medieval state in eastern Europe that existed from 1199 to 1349, with territory located predominantly in what is now Ukraine and extending into parts of modern Belarus, Poland, Romania, Moldova and Lithuania. Roman the Great unified the previously separate principalities of Halych and Volhynia around 1199, and the state became a kingdom in 1253 when Daniel was crowned king under papal authority, becoming the only member of the Rurik dynasty ever crowned king; alongside Novgorod and Vladimir-Suzdal it ranked among the most powerful successor states of Kievan Rus. Internal instability and pressure from Poland, Lithuania and the Golden Horde eventually broke the state apart, and after a joint Polish-Hungarian force occupied the territory it was incorporated into Poland in 1349, with Volhynia later falling under Lithuanian control by 1452.