The fifth Teacher Guru Arjan Dev, decided to build a place of worship in Amritsar. It would simply be called the Harimandir, the temple of God, and any person, irrespective of gender, caste, or creed, could visit and pray here. To symbolize its openness, it would have four entrances, without doors, and always open—inviting all from the four corners of the planet to freely enter.
To cement this openness as the very base of its existence, he invited Baba Sain Mir Mohammad Sahib of Lahore, to lay the foundation stone. Baba was a famous and revered sufi saint who was also referred to as Mian Mir, and he laid the foundation stone of the Harimandir in January 1588 AD. Guru Arjan Dev carried this inclusive view of God and spirituality into the compilation of the Guru Granth Sahib. He invited and sought contributions
The temple and the mosque are same
Pooja and Namaz are the same.
The Human race: recognize that it is of one and same caste.