A Buddha is a person who has developed all positive qualities and eliminated all negative qualities. A Buddha was an "ordinary" human like you and me before he/she became enlightened. Enlightenment is compared to awakening, as a person suddenly expereinces a complete transformation of body and mind from sleeping to waking up. One could say that a Buddha represents the very peak of evolution, as he/she is omniscient or all-knowing. 

Main Events in the Life of Gautama Buddha  Marriage (Kapilavastu) - 608 B.C.E Renunciation (Kapilavastu) - 595 B.C.E Enlightenment (Bodh Gaya) - 589 B.C.E 1st Year after Enlightenment (Sarnath) - 588 B.C.E. Death / Parinirvana at Kushinagar - 544 B.C.E

The historical Buddha, Shakyamuni or Gautama Buddha, lived about 2,500 years ago in India. However, he was not the first Buddha, and will not be the last either. He taught that during this eon (very long time period, maybe comparable to the life-time of the universe as we know it), there would be 1,000 fully enlightened Buddhas who would introduce Buddhism (after it has been totally forgotten). Numbers one to three are Krakucchanda, Kanakamuni, Kashyapa, then comes Shakyamuni (the historical Buddha some 2,500 years ago), and the next Buddha will be called Maitreya.

A Buddha is different from "God" in the Christian-Judeo-Islamic sense in that he/she is not the creator of the universe, is not omnipotent (all-powerful), and the state of Buddhahood can be reached by every living being (although it may take many lives). However, a Buddha is omniscient (knows everything) and can in that way be of tremendous help to other living beings.

Although Buddhism originated in India, the teachings of the Buddha and the lineages of awakening were preserved, deepened and clarified in Tibet. The invasion of Tibet by Communist China led to the exile of many of the most highly experienced and respected Tibetan Buddhist meditation masters, who almost immediately began teaching Western students. Many of these students have now become accomplished teachers themselves. 

About Prince Siddhartha.. 
There was a small country in what is now southern Nepal that was ruled by a clan called the Shakyas. The head of this clan, and the king of this country, was named Shuddodana Gautama, and his wife was the beautiful Mahamaya. Mahamaya was expecting her first born. She had had a strange dream in which a baby elephant had blessed her with his trunk, which was understood to be a very auspicious sign to say the least. 

As was the custom of the day, when the time came near for Queen Mahamaya to have her child, she traveled to her father's kingdom for the birth. But during the long journey, her birth pains began. In the small town of Lumbini, she asked her handmaidens to assist her to a nearby grove of trees for privacy. One large tree lowered a branch to her to serve as a support for her delivery. They say the birth was nearly painless, even though the child had to be delivered from her side. After, a gentle rain fell on the mother and the child to cleanse them. 

It is said that the child was born fully awake. He could speak, and told his mother he had come to free all mankind from suffering. He could stand, and he walked a short distance in each of the four directions. Lotus blossoms rose in his footsteps. They named him Siddhartha, which means "he who has attained his goals." Sadly, Mahamaya died only seven days after the birth. After that Siddhartha was raised by his mother’s kind sister, Mahaprajapati. 

King Shuddodana consulted Asita, a well-known sooth-teller, concerning the future of his son. Asita proclaimed that he would be one of two things: He could become a great king, even an emperor. Or he could become a great sage and savior of humanity. The king, eager that his son should become a king like himself, was determined to shield the child from anything that might result in him taking up the religious life. And so Siddhartha was kept in one or another of their three palaces, and was prevented from experiencing much of what ordinary folk might consider quite commonplace. He was not permitted to see the elderly, the sickly, the dead, or anyone who had dedicated themselves to spiritual practices. Only beauty and health surrounded Siddhartha. 

Siddhartha grew up to be a strong and handsome young man. As a prince of the warrior caste, he trained in the arts of war. When it came time for him to marry, he won the hand of a beautiful princess of a neighboring kingdom by besting all competitors at a variety of sports. Yashodhara was her name, and they married when both were 16 years old. 

As Siddhartha continued living in the luxury of his palaces, he grew increasing restless and curious about the world beyond the palace walls. He finally demanded that he be permitted to see his people and his lands. The king carefully arranged that Siddhartha should still not see the kind of suffering that he feared would lead him to a religious life, and decried that only young and healthy people should greet the prince. 

As he was lead through Kapilavatthu, the capital, he chanced to see a couple of old men who had accidentally wandered near the parade route. Amazed and confused, he chased after them to find out what they were. Then he came across some people who were severely ill. And finally, he came across a funeral ceremony by the side of a river, and for the first time in his life saw death. He asked his friend and squire Chandaka the meaning of all these things, and Chandaka informed him of the simple truths that Siddhartha should have known all along: That all of us get old, sick, and eventually die. 

Siddhartha also saw an ascetic, a monk who had renounced all the pleasures of the flesh. The peaceful look on the monks face would stay with Siddhartha for a long time to come. Later, he would say this about that time: 

When ignorant people see someone who is old, they are disgusted and horrified, even though they too will be old some day. I thought to myself: I don’t want to be like the ignorant people. After that, I couldn’t feel the usual intoxication with youth anymore. 

When ignorant people see someone who is sick, they are disgusted and horrified, even though they too will be sick some day. I thought to myself: I don’t want to be like the ignorant people. After that, I couldn’t feel the usual intoxication with health anymore. 

When ignorant people see someone who is dead, they are disgusted and horrified, even thought they too will be dead some day. I thought to myself: I don’t want to be like the ignorant people. After than, I couldn’t feel the usual intoxication with life anymore.

At the age of 29, Siddhartha came to realize that he could not be happy living as he had been. He had discovered suffering, and wanted more than anything to discover how one might overcome suffering. After kissing his sleeping wife and newborn son Rahula goodbye, he snuck out of the palace with his squire Chandara and his favorite horse Kanthaka. He gave away his rich clothing, cut his long hair, and gave the horse to Chandara and told him to return to the palace. He studied for a while with two famous gurus of the day, but found their practices lacking. 

Gautama studied under various teachers and followed their practices until he mastered them all. His first teacher was Alara Kalama who taught a form of meditation leading to an exalted form of absorption called "state of no-thingness", a state without moral or cognitive dimension. Gautama saw this was not going to solve suffering, and continued his search.

The next teacher was Udraka Ramaputra who taught him meditative absorption leading to “the state of neither perception nor non-perception”. Again, Gautama realized this was not the state he was looking for. (Both Alara and Udraka are by some scholars considered Jain followers.)

Next, he tried extreme ascetic practices at Uruvilva, with five other ascetics who turned into his followers. In the end, Gautama nearly died of starvation.

After about six years of searching, he realized that just wearing down his body did not generate new insights, but rather leads to weakness and self-destruction. When he decided to give up extreme asceticism, his students left him. 

He then sat down in a place now called Bodhgaya (North India) under a Bodhi-tree and decided not to get up anymore until he discovered the truth. Just a short time later, he became a fully enlightened Buddha. This means that he actualized all positive potentials of a sentient being and rid himself of all negative qualities. With this, he realized the true nature of existence and suffering (emptiness), and how suffering can be ended.

Seven weeks after enlightenment, the Buddha gave his first discourse in Sarnath, near Varanasi. Here he taught the 4 Noble Truths. The Buddha continued to teach during his life, until passing away at the age of 81