An article form http://whc.unesco.org : Siddhartha Gautama, the Lord Buddha, was born in 623 B.C. in the famous gardens of Lumbini, which soon became a place of pilgrimage. Among the pilgrims was the Indian emperor Ashoka, who erected one of his commemorative pillars there. The site is now being developed as a Buddhist pilgrimage centre, where the archaeological remains associated with the birth of the Lord Buddha form a central feature.
Justification for Inscription:The Committee decided to inscribe this site on the basis of criteria (iii) and (vi). As the birthplace of the Lord Buddha, the sacred area of Lumbini is one of the holiest places of one of the world's great religions, and its remains contain important evidence about the nature of Buddhist pilgrimage centres from a very early period.
Long Description:As the birthplace of the Lord Buddha - the apostle of peace and the light of Asia was born in 623 BC - the sacred area of Lumbini is one of the holiest places of one of the world's great religions, and its remains contain important evidence about the nature of Buddhist pilgrimage centres from a very early period. Lumbini, in the South-Western Terai of Nepal, evokes a kind of holy sentiment to the millions of Buddhists all over the world, like Jerusalem to Christians and Mecca to Muslims.
Lumbini is the place where the Buddha, known as the Tathagata, was born. It is the place which should be visited and seen by a person of devotion and which should cause awareness and apprehension of the nature of impermanence. The site and its surrounding area is endowed with a rich natural setting of domesticable fauna and favourable agricultural environ. Historically, the region is an exquisite treasure-trove of ancient ruins and antiquities, dating back to the pre-Christian era. The site, described as a beautiful garden in the Buddha's time, still retains its legendary charm and beauty.
The birthplace of the Gautama Buddha, Lumbini, is one of the four holy places of Buddhism. It is said in the Parinibbana Sutta that Buddha himself identified four places of future pilgrimage: the sites of his birth, Enlightenment, First Discourse, and death. All these events happened outside in nature under trees. There is no particular significance in this, other than it perhaps explains why Buddhists have always respected the environment and natural law.
Lumbini is situated at the foothills of the Himalayas in modern Nepal. In the Buddha's time, Lumbini was a beautiful garden full of green and shady sal trees (Shorea robusta ). The garden and its tranquil environs were owned by both the Shakyas and the clans. King Suddhodana, father of Gautama Buddha, was of the Shakya dynasty and belonged to the Kshatriya (warrior caste). Maya Devi, his mother, gave birth to the child on her way to her parent's home in Devadaha while resting in Lumbini under a sal tree in the month of May, 642 BC. The beauty of Lumbini is described in Pali and Sanskrit literature. Maya Devi, it is said, was spellbound to see the natural grandeur of Lumbini. While she was standing, she felt labour pains and catching hold of a drooping branch of a sal tree, she gave birth to a baby, the future Buddha.
In 249 BC, when the Indian Emperor Ashoka visited Lumbini, it was a flourishing village. Ashoka constructed four stupas and a stone pillar with a figure of a horse on top. The stone pillar bears an inscription, which in translation runs as follows: 'King Piyadasi (Ashoka), beloved of devas, in the 20th year of the coronation, himself made a royal visit, Buddha Sakyamuni having been born here; a stone railing was built and a stone pillar erected to the Bhagavan having been born here, Lumbini village was taxed reduced and entitled to the eight part (only)'.
Lumbini remained neglected for centuries. In 1895, Feuhrer, a famous German archaeologist, discovered the great pillar while wandering about the foothills of the Churia range. Further exploration and excavation of the surrounding area revealed the existence of a brick temple and sandstone sculpture within the temple itself, which depicts the scenes of the Buddha's birth.
It is pointed out by scholars that the temple of Maya Devi was constructed over the foundations of more than one earlier temple or stupa, and that this temple was probably built on an Ashokan stupa itself. To the south of the Maya Devi temple there is the famous sacred bathing pool known as Puskarni. It is believed that Maya Devi took a bath in this pool before the delivery. By the side of the Ashoka pillar a river which flows south-east and is locally called the Ol. In 1996, an archaeological dig unearthed a 'flawless stone' placed there by Ashoka in 249 BC to mark the precise location of the Buddha's birth more than 2,600 years ago. if authenticated, the find will put Lumbini even more prominently on the map for millions of religious pilgrims.
Source: UNESCO/CLT/WHCHistorical Description :The Shakya Prince Siddharta Gautama, better known as the Lord Buddha, was born to Queen Mayadevi, wife of King Suddodhana, ruler of Kapilavastu, in 623 BC at the famous gardens of Lumbini, while she was on a journey from her husband's capital of Tilaurakot to her family home in Devadaha.
In 249 BC the devout Buddhist Emperor Ashoka, third of the Mauryan rulers of India, made a pilgrimage to this very sacred area in company with his teacher, Upagupta, and erected pillars at Lumbini, Gotihawa, and Niglihawa, as he did in many parts of India, to commemorate his visit. The inscription on the Lumbini pillar identifies this as the birthplace of the Lord Buddha.
Lumbini was a site of pilgrimage until the 15th century AD. Its early history is well documented in the accounts of Chinese travellers, notably Fa Hsien (4th century AD) and Hsuan Tsang (7th century AD), who described the temples, stupas, and other establishments that they visited there. In the early 14th century King Ripu Malla recorded his pilgrimage in the form of an additional inscription on the Ashoka pillar.

Origional Lumbini and actual birth place of Lord Budhha Kapilvastu, Nepal

The reasons for its ceasing to attract Buddhist pilgrims after the 15th century remain obscure. The only local cult centred on worship of a 3rd-4th century image of Mayadevi as a Hindu mother goddess. The Buddhist temples fell into disrepair and eventually into ruins, not to be rediscovered until they were identified in 1896 by Dr A Fiihrer and Khadga Samsher, then Governor of Palpa, who discovered the Ashoka pillar.