BTW
Columbian( the gene, Co, which pushes black to the hackles and tail) has nothing to do with the country of Colombia.
It is named after the Chicago worlds fair of 1893
The worlds fair in Chicago was held on the 400th anniversary of Christopher
Colombus' voyage to the new world, and so It was called "The
Colombian World Exposition" (Colombian being used as an adjective meaning of or about Colombus)
This was the first time and place that Chickens with the "Colombian" pattern of plumage were shown.
edit:
Ok sorry After a bit of research the Chickens werent actually at the Expo, but were named in honor of it. The Colombian patterned birds were Wyandottes bred by H.M. Briggs trying to emulate the pattern of the light brahma(probably one of the reasons that Colombian brahmas are called light being that they existed before the gene was named)
Anyway the details are a bit sketchy, but it gives you a background for the name.
The Chicago Expo was in response to the 1889 worlds fair in Paris where the Eiffel Tower was the main attraction.