The high courts of India are the highest courts of appellate jurisdiction in each state and union territory of India. However, a high court exercises its original civil and criminal jurisdiction only if the subordinate courts are not authorized by law to try such matters for lack of peculiar or territorial jurisdiction. High courts may also enjoy original jurisdiction in certain matters, if so designated, especially by the constitution, a state law or union law.

The Constitution of India is the supreme law of India. The document lays down the framework that demarcates fundamental political code, structure, procedures, powers, and duties of government institutions and sets out fundamental rights, directive principles, and the duties of citizens, based on the proposal suggested by M. N. Roy. It is the longest written national constitution in the world.