Nepal is a landlocked country in Southern Asia, between the Tibet autonomous region of China and India. It contains 8 of the world's 10 highest peaks, including Mount Everest - the world's tallest - on the border with Tibet, and Lumbini, the birth place of Gautama Buddha, the founder of Buddhism. The territory of Nepal has a recorded history since the Neolithic age. The name "Nepal" is first recorded in texts from the Vedic Age, the era which founded Hinduism, the predominant religion of the country. In the middle of the first millennium BCE, Gautama Buddha, the founder of Buddhism, was born in southern Nepal. Parts of northern Nepal were intertwined with the culture of Tibet. The Kathmandu Valley in central Nepal became known as Nepal proper because of its complex urban civilisation. It was the seat of the prosperous Newar confederacy known as Nepal Mandala.