Complex sentence: Among all his works, Anania is best known for writing the "Ashkharatsuyts" ("Geography"), a historical atlas that gives detailed information on the 15 provinces of Armenia.
Split into simpler sentences: Among all his works, Anania is best known for writing the "Ashkharhatsuyts" ("Geography "). The"Ashkharhatsuyts" is a historical atlas that gives detailed information on the fifteen provinces of Armenia.