The Constitution of India was adopted on 26 November 1949. In memory of Dr BR Ambedkar, the Constitution Day is celebrated on 26 November every year.
 

The Constitution of India was inspired by the Constitutions of countries such as the UK, Ireland, Germany, Canada, and Australia, etc.
 

The Constitution of India was entirely written by hand. The original copy of the Constitution is preserved in the Library of Parliament.
 

The Constitution of India was prepared over a period of 2 years, 11 months, and 18 days. The original copies of the Constitution are handwritten in both Hindi and English.
 

Dr BR Ambedkar was the chief architect of the Constitution of India. However, the calligrapher who penned the original copies was Shri Prem Bihari Narayan Raizada. 
 

Prem Bihari Narayan Raizada completed the writing of the Constitution in 6 months. A total of 433 pen nibs were completely worn out during the endeavour.