Galleries - Gamma and Delta Quadrant Emblems
Note Several canon emblems can be found in the Star Trek Star Charts. Alas, two of them (of the Tholians and Species 8472) were made up for the book and are hence not shown here.
The Evolution of the Dominion Emblem - exhaustive survey of all variants
Special thanks to Jörg Hillebrand and Shisma.
Cultural Symbols @ Star Trek Minutiae (some non-canon)