Glass mosaic is an artistic technique that involves creating images, patterns, or designs by arranging small glass pieces, known as tesserae, on a surface. The tesserae are often colored and can be transparent or opaque, allowing for a wide range of visual effects when light passes through or reflects off them. Glass mosaics are commonly used to decorate walls, floors, ceilings, and other architectural elements. They have been employed for both functional and decorative purposes, adding vibrant colors and intricate details to various spaces. Glass mosaic art can be found in various cultures and historical periods, showcasing the versatility and beauty of this technique.