Sikh architecture is a style of architecture that was developed under the Sikh Confederacy and Sikh Empire during the 18th and 19th centuries in the Punjab region. Due to its progressive style, it is constantly evolving into many newly developing branches with new contemporary styles. Although Sikh architecture was initially developed within Sikhism its style has been used in many non-religious buildings due to its beauty. 300 years ago, Sikh architecture was distinguished for its many curves and straight lines; Keshgarh Sahib and the Harmandir Sahib (Golden Temple) are prime examples.