The palace was donated to the Hari-Tara charitable trust by Dr. Karan Singh for use as a museum.
The first volume of the encyclopedia contains a 44-page foreword by Dr. Karan Singh.
Pressure from Nehru and Sardar Patel eventually compelled Hari Singh to appoint his son and heir, Yuvraj (Crown Prince) Karan Singh, as Regent of Jammu and Kashmir in 1949, although he remained titular Maharaja of the state until 1952, when the monarchy was abolished.
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With his fourth wife, Maharani Tara Devi (1910–1967), he had one son, Yuvraj (Crown Prince) Karan Singh.
Engaged to Karan Singh of Kashmir until the engagement was broken off in 1949 by Hari Singh.
Its contributors include John Woodroffe (Arthur Avalon, the Englishman known for pioneering work in Tantra studies), Mahatma Gandhi, Sarojini Naidu, C. Rajagopalachari (the first Governor General of Independent India), T.L. Vaswani (the founder of Vaswani Mission, Pune), K.M. Munshi (the founder of Bharatiya Vidya Bhavan), Dr Karan Singh, H.H.Dalai Lama and Dr. APJ Abdul Kalam.
Manmohan Singh | Donna Karan | Maharaja Ranjit Singh | Anurag Singh | Yuvraj Singh | Ranjit Singh | Jagjit Singh | Vijay Singh | Guru Gobind Singh | Bhagat Singh | Karan Johar | Karan Singh | Khushwant Singh | Jai Singh I | Hari Singh | Talvin Singh | Simranjit Singh Mann | Parkash Singh Badal | Karan Oberoi | Karan Armstrong | Yograj Singh | Upasana Singh | Tiger Jeet Singh | Satendra Singh | Raj Singh | Mulayam Singh Yadav | Karamjit Singh | Harbhajan Singh | Ajit Singh | Sukhbir Singh Badal |
Some notable past participants include Ksénia Gorbachev, Barbara Berlusconi, Tamara and Petra Ecclestone, Vanessa and Victoria Traina, Anna Wallenberg, Princess Fawzia Latifa of Egypt, Karan Singh's granddaughter Adishree Singh, Wan Li's granddaughter Wan BaoBao and I.M. Pei's granddaughter Olivia Pei.
The Diwan Thakur Karan Singh (Kader Khan) is his loyal friend who stays at the prince's side all the time to train him for his future duties.