Bhutan is the last bastion of the Mahayana form of Buddhism in the world today. It was in the 8th century AD that Guru Padma Sambhava introduced Buddhism to the country. Subsequently this was promulgated by various other religious figures who visited Bhutan. The dominant sect that came to be established in the country was the Drukpa Kargyu sect of Mahayana Buddhism, which is now the official religion of Bhutan. Religious festivals (Tsechu) are important events and celebrated throughout the kingdom of Bhutan. The tsechus are the most colourful event and all Bhutanese gathers and celebrate at every Dzongs (fortress), temples, and monasteries.