blakenyp:

You can’t find information on this because it doesn’t really exist, except in pseudo-scientific books written by New Age crack pots. Celtic is a language family, not a cultural group. Celts were people who spoke a Celtic language. The Celts ranged from Spain and North Africa, up into the British Isles, and all the way into Eastern Europe and Turkey. They had no uniform architectural style. While the most famous examples of “Celtic” architecture are doubtlessly the various henges found throughout Britain, they aren’t representative of “Celts”, but of the people who inhabited England and Scotland a couple of thousand years before Christ. We don’t even really know if they themselves were Celts in the linguistic sense, since we can only map prehistoric culture groups through archaeological material. The only people identified in antiquity as Celts lived in central France. Herodotus called them Keltoi, Caesar and the Romans knew them as the Averni. You’ll probably have more luck finding information if you pick an actual culture rather than a broad linguistical designation.