Happy Teachers' Day! Check out some unseen pictures of India's beloved teacher, Dr. S Radhakrishnan

On his 131st birth anniversary, here are some of the rarest pictures of India's second President and first Vice President, Dr. Sarvepalli Radhakrishnan.

27/05/1964 - NEW DELHI: President S Radhakrishnan, administering the oath of office and secrecy to Gulzarilal Nanda who has been appointed as the Prime Minister. (Photo | PTI) 

Prime Minister Indira Gandhi with President S Radhakrishnan (Photo | PTI)

Picture shows (from left) Prime Minister Jawaharlal Nehru, Rajendra Prasad, Yugoslavian President Tito and S Radhakrishnan. (Photo | PTI)

Chief Minister K Kamaraj receives President Dr S Radhakrishnan at the Meenambakkam airport. (Photo | EPS)

Chief Minister K Kamaraj is seen with President S Radhakrishnan (left) and Ministers M Bhakthavatsalam (2nd right) and G Bhuvarahan (extreme right) (Photo | EPS)

Dr Sri Lal Bahadur Shastri, Dr S Radhakrishnan and Nepal King Mahendra (Photo | EPS)

NEW DELHI: President S Radhakrishnan (right) administering the oath of office to Morarji Desai as the Deputy Prime Minister and Finance Minister. (Photo | PTI)

S RadhaKrishnan, President of India with Secretary General of the UN, U Thant (Photo | EPS)

29/10/1964 - CHENNAI : S RadhaKrishnan, President of India who arrived at the Meenambakkam airport is being received by Jayachamaraja Wadiyar Bahadur, Governor of Madras. (Photo | EPS)

10/05/1967 - NEW DELHI : S Radhakrishnan, Former President of India, gave a luncheon for the Union Ministers at Rashtrapati Bhavan. Outgoing president is shaking hands with the incoming president Jakir Hussain. (Photo | EPS)

Dr S Radhakrishnan, President of India presented the Award of Bharat Ratna to Dr Rajendra Prasad. (Photo | EPS)

Actor Sivaji Ganesan (extreme left) with President S Radhakrishnan (Photo | PTI)

07/05/1967 - NEW DELHI: A farewell function was organised by Members of Parliament to bid farewell to the outgoing president, Dr S Radhakrishnan at the Parlaiment house. The Chairman of the Rajya Sabha, Dr Zakir Hussain garlands the President on the occassion. (Photo | PTI)

02/01/1968 - CHENNAI: Zakir Hussain, President of India meets Dr S Radhakrishnan at his residence. (Photo | EPS)

This picture shows Zakir Hussain sworning in as the new President of India. Also seen in the picture are Dr S Radhakrishnan and Chief Justice Wanchoo. (Photo | EPS)

20/08/1962 - NEW DELHI : D K Pattammal is seen receiving the Karnatak Vocal Music award from the President Dr S Radhakrishnan at the Vigyan Bhavan. (Photo | EPS)