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Anuradhapura was the capital of Sri Lanka during the Anuradhapura period, which lasted from the 4th century BC to the 10th century AD. Anuradhapura is a UNESCO World Heritage Site and is home to many ancient Sinhalese buildings, including temples, palaces, and monasteries. The architectural style of these buildings is known as Ancient Sinhalese architecture and is characterized by its use of brick, stone, and timber.