Stained glass windows are an important element in both religious and civil architecture. Stained glass windows are fascinating art crafts because they are multifunctional, e.g., mainly acting as filters for light and as iconographic supports. The art of stained flourished in the time period of 1100 and 1500, when magnificent windows were created for great cathedrals. The stained glass windows were the major pictorial art form in northern France, Germany and England during the flourishing period. It is known that there are the relationship between color and colorants. The colors in the stained glass are attributed to different chemical compounds that were added to the molten glass during processing. The addition of metallic oxides called pot-metal glass changed the color of the windows-gold for red, copper for green, cobalt for blue and soon.BR Most of the properties of traditional ceramics originated from the fact that their raw materials (natural clays) are nanosized. The practical metal nanoparticles used for the pottery and glass are copper, silver and gold dispersed in an optically clear matrix. Incorporation of metallic silver at the glass surface has remained the usual method to obtain yellow stained glass windows.BR The electron cloud at the surface of a nanoparticle resonates with different wavelengths of light depending upon their frequency at the nanoscale. Depending on the size of the nanoparticle, the electron cloud resonates with a particular wavelength of light and absorb that wavelength. A nanoparticle of about 90 nm in size will absorb colors on the red and yellow end of the color spectrum to achieve the nanoparticle appear blue-green.