Question

Who constructed gurudwara harminder sahib

Answer 1

Arjan
The first Harmandir Sahib was built in 1604 by Arjan, the fifth Sikh Guru, who symbolically had it placed on a lower level so that even the humblest had to step down to enter it. He also included entrances on all four sides, signifying that it was open to worshippers of all castes and creeds.