铜镜是古代照面用具，为古代日用品中常见之物，多见于陪葬品，是墓葬断代标准器之一。在玻璃镜出现并普及后，铜镜退出历史舞台。铜镜纹饰型制多样，随着时代背景、风尚习俗等的改变而不断变化，是研究古代艺术的重要依据。 中国铜镜的起源传说纷纭，出土实物中最早者为齐家文化墓葬出土铜镜，可追溯到公元前2000年左右。在商周、春秋战国、汉唐至明清的墓葬中都有出土各式铜镜，这些实物是我国铜镜史的最有力见证。汉代是铜镜发展的高峰时期，工艺考究，内涵丰富。按纹饰的特点，学者将汉代铜镜划分为神兽镜、龙虎纹镜、画像镜等十五种。 此藏品汉代神兽纹铜镜呈圆形（或称圆板形），直径7厘米。正面素面锈蚀，背面中间是乳钉形（或称半球形）钮，带孔（可系带，方便手持或系在镜台上），圆钮座。内区以钮为中心环绕高浮雕三兽纹，一圈栉齿纹。边缘略高，整体纹饰层次感丰富，充满张力。这件铜镜虽部分锈蚀磨损，但其主题纹饰三兽形象仍可见。 英文翻译：Bronze mirror is an ancient utensil for face-to-face. It is a common thing in ancient daily necessities. After the appearance and popularity of glass mirrors, bronze mirrors withdrew from the stage of history. There are various types of decorative patterns on the bronze mirror, which are constantly changing with the changes of the time background and customs, which is an important basis for studying ancient art. Chinese bronze mirrors have different origins and legends. The earliest unearthed bronze mirrors were unearthed from the Qijia Cultural Tombs, dating back to around 2000 BC. Various bronze mirrors have been unearthed in the tombs of the Shang and Zhou Dynasties, the Spring and Autumn Period and the Warring States Period, the Han and Tang Dynasties, and the Ming and Qing Dynasties. These objects are the most powerful witness to the history of bronze mirrors in China. The Han Dynasty was the peak period for the development of bronze mirrors, with exquisite craftsmanship and rich connotations. According to the characteristics of the ornamentation, scholars divided the Han Dynasty bronze mirrors into fifteen types, including beast mirrors, dragon-tiger mirrors, and portrait mirrors.   This collection of Han dynasty beast-shaped bronze mirrors are round (or disc-shaped) with a diameter of 7 cm. The front surface is rusted, and the middle of the back is a milk nail-shaped (or hemispherical) button with holes (can be strapped for easy holding or tied on the stage), and a round button seat. The inner area is surrounded by a three-relief pattern of three beasts with a button as the center, and a circle of fangs. The edges are slightly higher, and the overall texture is rich in layers and full of tension. Although this bronze mirror is partially rusted and worn, its motif of the three beasts still visible.