The letter T.
This is a reverse-gilded glass sign. The glass was etched in the shape of the outline of a letter T. The letter has a traditional appearance with three separate tones of gold, gilded across the etching. Gold in 24, 18 and 12 carats was blended to form the outline of the letter, with a classic body of deep green for the letter and deep blue for the background. Everything was applied in reverse to the back of the glass.