The Indian film industry consists of several regional film industries across India, with the largest being Bollywood based in Mumbai. The earliest Indian films were produced in the 1930s and promoted Indian culture. Dadasaheb Phalke is considered the father of Indian cinema. Post-independence, films reflected themes of nation-building. Today, Indian cinema is a global industry but regional industries like Tamil, Telugu, Bengali and others also thrive based on language. The CBFC regulates film content and ratings in India.