Guru Nanak had been a famous person in the history of Indian Sikhism and a renowned prophet and philosopher. To him no religion was greater than humanity and he stressed on the requirement for nuptial bonds and also made it clear to his devotees that without leading a family life it is very difficult to abstain from the worldly desires. To Nanak it was faith that mattered;
"Let’s have faith that right makes might; and in that faith let us, to the end, dare to do our duty as we understand it."
After the demise of the Guru, there had been a great conflict regarding the dead body; the Muslim wanted to bury it while the Hindus wanted to cremate the same. So, there is a Muslim Grave for the Great Guru at Kartarpur and also a Hindu Tomb for Nanak on the either side of the River Ravi.
Guru Nanak stressed on the ideal of life rather than following any particular religion; to him every religion was the same and one must follow it with utmost zeal and fervor. Therefore the Muslims treated him like a Peer and the Hindu aficionados treated him like a Guru. A Gurudwara was raised to commemorate the Guru and this is Gurudwara Thumb Sahib of Maghi in Kartarpur.
But the situation became tight when Sir Radcliff drew a boundary line between the two countries, India and Pakistan. The plan was to divide the entire region of Gurudaspur and so the plan did not succeed.
But ultimately a line was drawn through Kartarpur so the tomb went to Pakistan and the grave fell into the Indian side. Still now the region of Kartarpur stands to the amazement of people; although grass had overgrown the entire stretch of land, it is one of the most revered places for the Gurudwara Thumb Sahib of Maghi in Kartarpur.