Airlangga was a prominent king of the Mataram Kingdom in Indonesia during the 11th century. He is known for unifying various regions in East Java and promoting the spread of Hinduism and Buddhism. His reign is often associated with cultural and economic prosperity. Airlangga's legacy includes the establishment of several temples, such as Candi Penataran, which reflect the architectural style of the time. He is also remembered for his efforts in governance and administration, which helped stabilize the region and foster trade. His life and achievements are celebrated in Indonesian history.