Louis IV of Bavaria was a German king who ruled from 1314 to 1347. He became the Holy Roman Emperor in 1328 and was known for his efforts to strengthen the power of the monarchy. His reign was marked by conflicts with the Pope and rival claimants to the throne, which led to significant political struggles in the region. Louis IV was also a patron of the arts and supported the development of Gothic architecture. His reign saw the construction of notable buildings, including the Frauenkirche in Munich. He is remembered for his attempts to unify the various German states under his rule.