Sikhism achieved a series of military victories and created a Sikh Empire in 1799. The Sikh empire had its capital in Lahore, spread over almost comprising what is now northwestern Indian subcontinent. The Sikh Empire entered into a treaty with the colonial British powers, with each side recognizing Sutlej River as the line of control and agreeing not to invade the other side. Ranjit Singh's most lasting legacy was the restoration and expansion of the Harmandir Sahib, most revered Gurudwara of the Sikhs, with marble and gold, from which the popular name of the "Golden Temple" is derived. After the death
Sikh art and culture Harmandir Sahib. Sikh culture is heavily influenced by militaristic motifs, with Khanda being the most obvious; thus it is no surprise that the majority of Sikh artifacts, independent of the relics of the Gurus, have a military theme. This motif is again evident in the Sikh festivals of Hola Mohalla and Vasakhi which feature marching and practicing displays of valor respectively. The art and culture of the Sikh diaspora has been merged with that of other indo-immigrant groups into categories such as 'British Asian', 'Indo-Canadanian' and 'Desi-Culture'; however there has emerged a niche cultural phenomenon that can be described as