Bullseye Glass is hand-blown glass distinguished by a circular mark or thicker central disc created during the traditional crown glass manufacturing process. The characteristic \'bullseye\' results from the pontil attachment point remaining visible after the glass has been spun into a flat sheet. Frequently found in Georgian and early Victorian windows, lanterns and architectural glazing, bullseye glass is highly valued for its historic authenticity, subtle distortions and ability to catch and refract light beautifully.