Nishan Sahib
The Nishan Sahib is a Sikh triangular flag made of cotton or silk cloth, with a tassel at its end. The word, Nishan means symbol, and the flag is hoisted on a tall flagpole, outside most Gurdwaras. The flagpole itself covered with fabric, ends with a two-edged dagger (khanda) on top. The emblem on the flag is also known as Khanda, which depicts a double-edged sword called a khanda (☬) in the centre, a chakkar which is circular, and flanked by two single-edged swords, or kirpans.
Traditional symbol of the Khalsa Panth, the Nishan Sahib can be seen from far away, signifying the presence of Khalsa in the neighbourhood. It is taken down every Baisakhi, and replaced with a fresh flag, and the flagpole refurbished.
History
According to Singha, usage of Nishan Sahib originates with Guru Hargobind, however khanda usage starts later, probably in the 19th century. According to McLeod, Nirankari Satguru Darbar Singh (1855–70) raised a red Nishan Sahib "as a symbol of revolution which was to free the Sikhs from Brahman clutches".