
Extract the answer to the question from the following context.
Question: Why did Grand Duchy of Lithuania become a famous place for noble Ruthenian families to get intermarried?
Context: In Ruthenia the nobility gradually gravitated its loyalty towards the multicultural and multilingual Grand Duchy of Lithuania after the principalities of Halych and Volhynia became a part of it. Many noble Ruthenian families intermarried with Lithuanian ones.

after the principalities of Halych and Volhynia became a part of it
