Parakramabahu I (Pali Maha Parakaramabahu 1123–1186) was king of the Kingdom of Polonnaruwa from 1153-86. During his reign from the capital city of Polonnaruwa, he unified the three lesser kingdoms of the island, becoming one of the last monarchs in Sri Lankan history to do so. He oversaw the expansion and beautification of his capital, constructed extensive irrigation systems, reorganized the country's army, reformed Buddhist practices, encouraged the arts and undertook military campaigns in South India and Burma. The adage "not even a little water that comes from the rain must flow into the ocean without being made useful to man" is one of his most famous utterances.