Ladislaus I of Hungary, also known as Saint Ladislaus, was a king who ruled from 1077 to 1095. He was a member of the Árpád dynasty and is known for his efforts to strengthen the kingdom of Hungary and promote Christianity. His reign was marked by military campaigns against neighboring territories, including the Kievan Rus and Bulgarians. Ladislaus is often celebrated for his just rule and support of the church, which helped to consolidate the power of the monarchy. He was canonized as a saint after his death, and his feast day is observed on June 27. His legacy continues to influence Hungarian culture and history.