Kolkata, formerly known as Calcutta, is the capital of the Indian state of West Bengal. Kolkata is the cultural capital of India and the commercial capital of Eastern India, located on the east bank of the Hooghly River.Till 1912, Calcutta was the capital of India, when the British moved the capital city to Delhi.Kolkata has long been known for its literary, artistic and revolutionary heritage. As the former capital of India, Kolkata was the birthplace of modern Indian literary and artistic thought.Durga Puja is the most important and the most glamorous event in Kolkata.