Research for this Literature Review on the Conservation of Silvered Glass Mirrors has brought a very important fact to light: there is no literature on the conservation of silvered glass mirrors. There is only one citation that even mentions it, and a paragraph is dedicated to it. There are, however, related areas that are critical to the understanding of the looking glass manufacturing process. A knowledge of the technologies that existed at the time of early looking glass production is important. Without this information it would be difficult to understand what the problems might be. This is just one reason why this review is so varied. It covers treatment, materials, silvering, history, bibliographies, and ethics.