Bela IV was one of the rulers of the Árpád House. After the death of his father, Andrew II, he ascended the throne in 1235. In the early years, he sought reconciliation with neighboring states stronger than him, such as the Habsburgs and the Byzantine Empire. As a result, he managed to stabilize the domestic political situation and made peace with nearby countries. However, in 1241, the invasion of the Mongol army shook the empire. Led by the king, the Hungarian army suffered a heavy defeat in the Battle of Muhi. The country disintegrated for many years, and he was forced to flee before the Tatar attack. He returned in 1242. He began to rebuild the state. He founded the royal chancellery, whose task was to promote literacy and modernize state administration. During his reign, economic life boomed in Hungary, as he promoted trade, mining and coinage. He supported the development of science and the arts. He died in 1270. Among his descendants, only Elizabeth reached adulthood and was later canonized.

ARC. During Béla's reign, Hungarian silver money was better, more valuable and much more stable in terms of value fluctuations than in the preceding one and a half hundred years. The minting of coins in the medieval Árpád IV. It reached its highest level of development during Béla's reign, especially in the new series he introduced. The obverse of the coins, in most cases, shows a seated royal figure or a crowned head, although other representations also occur. The backs are varied, often decorated with a coat of arms, the double cross of Hungary or sometimes with the coats of arms of the queens. Later, under the influence of Vienna denarius, various animal figures, symbolic images and other figures also appeared as decorative elements. Some of the coins were without circulation. IV. During Béla's reign, the heavier types of coins were soon replaced by small "fine silver" denarii minted on the basis of a lighter monetary base. The fineness of the silver coins is the best XI. it corresponded to the fineness of century obolus. As a result of the organized coinage, the distribution of Friesach denarii and bullion silver was restricted. However, the kings lacked the consistency and decisiveness that would have been necessary to successfully implement the reforms. ARC. Béla was also unable to abolish the system of annual money renewal.