Vijayabahu I was a king of the Kingdom of Polonnaruwa in Sri Lanka, reigning from 1055 to 1110 AD. He is best known for his efforts to reunify the island after a period of division and conflict. His reign marked a significant revival of the kingdom's power and stability. During his rule, Vijayabahu I focused on restoring Buddhist practices and promoting the construction of temples and stupas. He is credited with strengthening the economy and improving agricultural productivity, which helped to support the growing population and enhance the overall prosperity of the kingdom.