Glass block, is an architectural element used in areas where privacy or visual obstruction is desired while admitting light, such as wall design,partition, underground parking garages, washrooms, and municipal swimming baths. Glass block was originally developed in the early 1900�s to provide natural light in industrial factories. Glass brick can admit light without compromising security, since a typical size of glass brick is 8 by 8 inches, fitting within the lattice of standard 8 by 16 inch cinder block walls.