Explanation:

The First Buddhist Council was held at the entrance of Sattapanni Cave, Rajargaha (Known as Rajgir in Present time) and known as the Council of Rajargaha. The second Buddhist Council was held after the 100 years of Lord Buddha's death. It was believed to be held in 386 CE and was held at Vaishali , an ancient city of India . The Third Buddhist Council or Buddhist Council: Pataliputra II was held during the time of Great Emperor Ashoka 's time ( 250 BCE ) and was held at Pataliputra . The Fourth Buddhist Council was held under the Theravada traditions and was held in Tambapani of Sri Lanka during the time of First Century BCE . It is said that Fourth Buddhist Council was held under the leadership of King Kanishka .