Ranjit Singh British. Singh is remembered for uniting Sikhs and founding the prosperous Sikh Empire. He is also remembered for his conquests and building a well-trained, self-sufficient Khalsa army to protect the empire. He amassed considerable wealth, including gaining the possession of the Koh-i-Noor diamond from Shuja Shah Durrani of Afghanistan, which he left to Jagannath Temple in Puri, Odisha in 1839. Perhaps Singh's most lasting legacy was the restoration and expansion of the Harmandir Sahib, the most revered Gurudwara of the Sikhs, which is now known popularly as the "Golden Temple". Much of the present decoration at the Harmandir Sahib, in
Nishan Sahib Sahib can be seen from far away, signifying the presence of Khalsa in the neighbourhood. It is taken down every Baisakhi (harvest festival, mid-April in the Gregorian calendar), and replaced with a fresh flag, and the flagpole refurbished. During the times of Guru Amar Das the Nishan Sahib was white, to represent peace and simplicity. During the time of Guru Hargobind, however the Nishan Sahib changed into a shade of yellow, known as Basanti. After the creation of Khalsa, Guru Gobind Singh introduced blue flag, which is still the colour of the Nihang flags. The first Sikh flags were plain,