Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is an island nation in South Asia, located about 31 kilometers (18½ mi) off the southern coast of India. Originally known as Heladiva, it is home to more than twenty million people.

Sri Lanka is a strategic naval link between West Asia and South East Asia and has been a centre of Buddhist religion and culture from ancient times. Today, Sri Lanka is a multi-religious and multi-ethnic nation, with a fifth of the population following faiths other than Buddhism - notably Hinduism, Christianity and Islam. The Sinhalese community forms the majority of the population (around 74%), with Tamils, who are mostly concentrated in the north and east of the island, forming the largest ethnic minority. Other communities include the Muslim Moors and Malays as well as Burghers.

Famous for the production and export of tea, coffee, rubber and coconuts, Sri Lanka boasts a progressive and modern industrial economy. The natural beauty of Sri Lanka's tropical forests, beaches and landscape, as well as its rich cultural heritage make it a world famous tourist destination.

After over two thousand years of rule by local kingdoms, parts of Sri Lanka were colonized by Portugal and the Netherlands beginning in the 16th century, before the control of the entire country was ceded to the British Empire in 1815. During World War II Sri Lanka served as an important base for Allied forces in the fight against the Japanese Empire. A nationalist political movement arose in the country in the early 20th century, with the aim of obtaining political independence, which was eventually granted by the British after peaceful negotiations in 1948. Since then Sri Lanka has enjoyed a stable democracy and continuous economic progress, despite the ongoing conflict between the Sri Lankan government and a separatist militant group known as the LTTE in the northeastern parts of the country.

The island is the home of two main traditional cultures: the Sinhalese (centered in the ancient cities of Kandy and Anuradhapura) and the Tamil (centered in the city of Jaffna). In more recent times a British colonial culture was added, and lately Sri Lanka, particularly in the urban areas, has experienced a dramatic makeover in the western mold. Until recently, for example, most Sri Lankans, certainly those in the villages, have eaten traditional food, engaged in traditional crafts and expressed themselves through traditional arts. But economic growth and intense economic competition in developed countries has spilled over to most of Sri Lanka, producing changes that might variously be identified as progress, westernisation or a loss of identity and assimilation.

Buddhism in Sri Lanka is primarily of the Theravada school, and constitutes the religious faith of about 70% of the population According to traditional Sri Lankan chronicles (such as the Dipavamsa), Buddhism was introduced into Sri Lanka in the 2nd century BC by Venerable Mahinda, the son of the Emperor Ashoka, during the reign of Sri Lanka's King Devanampiyatissa. During this time, a sapling of the Bodhi Tree was brought to Sri Lanka and the first monasteries were established under the sponsorship of the Sri Lankan king. The Pali Canon, having previously been preserved as an oral tradition, was first committed to writing in Sri Lanka around 30 BC.

Sri Lanka has the longest continuous history of Buddhism of any Buddhist nation, with the Sangha having existed in a largely unbroken lineage since its introduction in the 2nd century. During periods of decline, the Sri Lankan monastic lineage was revived through contact with Thailand and Burma. Periods of Mahayana influence, as well as official neglect under colonial rule, created great challenges for Theravada Buddhist institutions in Sri Lanka, but repeated revivals and resurgences — most recently in the 19th century — have kept the Theravada tradition alive for over 2000 years.

Religion plays an important part in the life and culture of Sri Lankans. The Buddhist majority observe Poya Days, once per month according to the Lunar calendar. The Hindus and Muslims also observe their own holidays. There are many Buddhist temples in Sri Lanka and many mosques, Hindu temples and churches across the island, especially in areas where respective communities are concentrated. Buddhists are distributed across most parts of the island except in the north. Hindus are concentrated in north, east, and central high lands. Christians, particularly Roman Catholics are mainly concentrated along the western coastal belt. Muslims are concentrated in several pockets along the coast and in interior. All religious communities are represented in western province and in other urban centers in sizable numbers.