Deco Initials font (CastleType) for Windows and Macintosh.
You can buy and download the font online. Click on the sample picture to see detailed information about the font.
Deco Initials Initials
This is a wonderful geometric typeface that is very art deco.
Looks best at very large (at least 100 point) sizes.
This font is uppercase only (no numerals) with some alternate characters and a set of tiling patterns.