Who invented stained glass windows in Medieval Times?

They panted it to get detail's, but it was more then that. stained glass is made by taking pieces of colored glass and setting it out to make shape of a picture. The stained glass is made by strips of led that are sottered together, forming a dark liner eliminate in the picture. The glass could be panted or not panted it was usly was panted to get such details. such as eyes, noses, and mouths into the picture. it could be stained to change the color.