The Constitution of India (Bhāratīya Saṃvidhāna) 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. It is the longest written constitution of any country on earth. Dr. B. R. Ambedkar was a wise constitutional expert, he had studied the constitutions of about 60 countries. Ambedkar is recognized as the “Father of the Constitution of India”.