The Indian Constitution has 12 schedules, which are tables containing additional details not mentioned in the articles. The schedules were first mentioned in the Government of India Act, 1935, which included 10 schedules. When the Indian Constitution was adopted in 1949, it had 8 schedules. Later, with subsequent amendments, the number of schedules increased to 12. The schedules cover a wide range of topics, including the official languages of India, the list of states and union territories, and the powers and responsibilities of municipalities.