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
Sikh scriptures They have been referred to as the "Key to the Sri Guru Granth Sahib" by Guru Arjan Dev, the fifth Sikh guru. He was the first scribe of Guru Granth Sahib and a scholar of great repute. From his work, it is clear that he had mastery of various Indian languages and had studied many ancient Indian religious scriptures. Panjab Digital Library in collaboration with the Nanakshahi Trust took up digitization of Sikh scriptures in 2003. Thousands of manuscripts have been digitized and are available online at Panjab Digital Library. Sikh scriptures The principal Sikh scripture is the "Adi Granth"