Roman the Great in the context of "Prince of Novgorod"

The Principality or, from 1253, Kingdom of Galicia–Volhynia, also known as the Kingdom of Ruthenia or Kingdom of Rus', was a medieval state in Eastern Europe which existed from 1199 to 1349. Its territory was predominantly located in modern-day Ukraine, with parts in Belarus, Poland, Romania, Moldova, and Lithuania. Along with Novgorod and Vladimir-Suzdal, it was one of the three most important powers to emerge from the collapse of Kievan Rus'.

Roman the Great united the principalities of Galicia and Volhynia at the turn of the 13th century. Following the destruction wreaked by the Mongol invasion of Kievan Rus' (1239–1241), Prince Daniel of Galicia and the other princes of Rus' pledged allegiance to Batu Khan of the Golden Horde in 1246. The Polish conquest of the kingdom in 1349 led to it being fully absorbed by Catholic Poland. Upon annexing it in 1349, Polish king Casimir III the Great adopted the title of King of Poland and Ruthenia, and the territory was transformed into the Ruthenian Voivodeship (Latin: Palatinatus Russiae) in 1434.

The Rurik dynasty, also known as the Rurikid or Riurikid dynasty, as well as simply Rurikids or Riurikids, was a noble lineage allegedly founded by the Varangian prince Rurik, who, according to tradition, established himself at Novgorod in the year 862. The Rurikids were the ruling dynasty of Kievan Rus' and its principalities following its disintegration.

The Romanovichi ruled the southwestern territories, which were unified by Roman the Great and his son Daniel, who was in 1253 crowned by Pope Innocent IV as the king of Ruthenia. Galicia–Volhynia was eventually annexed by Poland and Lithuania. The northern and northeastern territories were unified by the Daniilovichi of Moscow; by the 15th century, Ivan III threw off the control of the Golden Horde and assumed the title of sovereign of all Russia. Ivan IV was crowned as the tsar of all Russia, where the Rurik line ruled until 1598, following which they were eventually succeeded by the House of Romanov.

This is a list of princes of Galicia (Halych or Halychyna) and its sister principality Volhynia (Volyn' or Volodymyr; Latin: Lodomeria). They were basically separate principalities (rulers being closely related), until Roman Mstislavich "the Great" united Halych and Volhynia in 1199. He was a prince (knyaz) of Volhynia who conquered also Halych, but immediately gave it to his son.

They continued usually as separate states, but within the same dynasty and under vassalage to the knyaz of Halych until Lev, who annexed Volhynia to the principality. The royal crown lapsed and rulers were known as princes and/or dukes after the death of Andriy Yuriyovych (1323).

The Principality or, from 1253, Kingdom of Galicia–Volhynia, also known as the Kingdom of Ruthenia or Kingdom of Rus', was a medieval state in Eastern Europe which existed from 1199 to 1349. Its territory was predominantly located in modern-day Ukraine, with parts in Belarus, Poland, Romania, Moldova, and Lithuania. Along with Novgorod and Vladimir-Suzdal, it was one of the three most important powers to emerge from the collapse of Kievan Rus'.

Roman the Great united the principalities of Galicia and Volhynia at the turn of the 13th century. Following the destruction wreaked by the Mongol invasion of Kievan Rus' (1239–1241), Prince Daniel of Galicia and other princes of Rus' pledged allegiance to Batu Khan of the Golden Horde in 1246. In 1253 Daniel was crowned King of Ruthenia by the Pope in an attempt to create an anti-Mongol alliance. However the attempts to free Ruthenia from the influence of Golden Horde khans ultimately failed. Polish conquest of the kingdom in 1349 led to it being fully absorbed by Catholic Poland.