“The construction of Harmandir Sahib was intended to build a place of worship for men and women from all walks of life and all religions to come and worship God equally. Accordingly, as a gesture of this non-sectarian universalness of Sikhism, Guru Arjan had specially invited Muslim Sufi saint, Hazrat Mian Mir to lay the foundation stone of the Harmandir Sahib.” More on Wikipedia.
The Golden Temple in Amritsar
“The construction of Harmandir Sahib was intended to build a place of worship for men and women from all walks of life and all religions to come and worship God equally. Accordingly, as a gesture of this non-sectarian universalness of Sikhism, Guru Arjan had specially invited Muslim Sufi saint, Hazrat Mian Mir to lay the foundation stone of the Harmandir Sahib.” More on Wikipedia.