What is "hatadage"

Hatadage ( Sinhala: ) is an ancient relic shrine in the city of Polonnaruwa, Sri Lanka. It was built by Nissanka Malla, and had been used to keep the Relic of the tooth of the Buddha. The Hatadage had been built using stone, brick and wood, although only parts of the brick and stone walls now remain. It appears to have been a two-storey structure, but the upper storey has now been destroyed. Three Buddha statues carved out of granite rock are located within a chamber of the shrine.