Buddhism is not declined in India. The philosophies of buddha attained a status of separate religion outside India, assimilating the philosophies of countries where it spread.Buddhism and Jaininsm was there in India as shramana philosophical school, like other schools of India like smarta philosophies that includes vedanta, samkhya, yoga, mimamsa, nyaaya, visheshika...All these philosophical schools merged to form morden Hindu religion that includes Shramanas and smarta schools simultaniously. Hindus have deep respect to buddha and his teachings , as it is also part of Hindu school of thought.
the birthplace of Buddhism is in the Himalayan mountains in India.
The Beatles did not come to popularity in the 21st century. They came to popularity in the 1960s.
6th century
Buddhism wasn't found in the 6th century! It was 500 years before the birth of Jesus.
18th century
It is the modern branch which is the nearest to the original. Buddhism has at least two main branches, Theravada which started in 6th century BCE and Mahayana, 3rd century BCE.
Buddhism
around 5 century bce
19th - 21 century.
Siddhartha Gautama; 6th century BC
Siddhartha Gautama; 6th century
It came to Vietnam in the 1st century