The Tang Dynasty Bronze Mirror Museum in Xi'an is the only specialized museum in Northwest China dedicated to ancient Chinese bronze mirrors. It officially opened to the public for free on June 26, 2015. 　Bronze mirrors served various purposes such as religious implements (for securing national peace and warding off evil spirits), ritual gifts, and practical tools (for reflection). They are a continuous and orderly inherited treasure in ancient Chinese cultural heritage, closely related to the development of societies throughout history; they are also closely linked to the culture, beliefs, and customs of the Chinese nation. Their role gradually faded from the historical stage with the advent and popularization of glass mirrors. 　The museum displays over 300 precious bronze mirrors, including highlights from various dynasties such as the Four-Mountain Mirror from the Spring and Autumn and Warring States periods, the Geometric Mirror from the Han Dynasty, the Flower Mirror and Chronological Mirror from the Tang Dynasty, the Taoist Figure Mirror from the Song Dynasty, and the Inscription Mirrors from the Ming and Qing dynasties.