New Delhi, August 27: In a letter to Prime Minister Narendra Modi, his predecessor Dr Manmohan Singh has urged that the historic Teen Murti complex, dedicated to the memory of India's first PM Jawaharlal Nehru, should be left undisturbed.Dr Singh raised concerns over what he described as an 'agenda' to 'change the nature and character' of the Nehru Memorial Museum and Library (NMML) and the Teen Murti complex.'Jawaharlal Nehru belongs not just to the Congress but to the entire nation. It is in that spirit that I have written to you,' Dr Singh's letter said.Dr Singh's letter comes in the wake of reports that the Narendra Modi government wants to create a museum dedicated to all prime ministers in the Teen Murti complex.The NMML was dedicated to the memory of India's first prime minister, who had left an indelible imprint both on India and the rest of the world, the Congress leader said.'His distinctiveness and greatness have been acknowledged even by his political rivals.'Dr Singh claimed that no effort was made to change the nature of the NMML and the Teen Murti complex during the tenure of Atal Bihari Vajpayee as prime minister.'But sadly it seems to be part of the agenda of the Government of India now,' Dr Singh wrote in his letter.