Anuradhapura is known to be the centre of Theravada Buddhism for many centuries in the past. Due to its continuous association with Buddhism, the city is today surrounded by Dagobas, temples, palaces and monasteries covering an area of over 40 square kilometers. From fourth century BC until the beginning of the 11th century AD, it was the capital city of many kings. It is known that, King Pandukabhaya made Anuradhapura as his capital in the 4th century BC and he laid out the town and its suburbs including Abhayavapi (lake). His grandson Devanampiya Tissa, was the king and the contemporary to Emperor Ashoka of India, whose period Buddhism was first introduced to this island. Emperor Ashoka’s son Mahinda Thera came to Sri Lanka from India on the full moon day of the month of Poson (June) and met King Devanampiyatissa in Mihintale Rock. The king embraced Buddhism and all his people followed the same.