Nvroo Structure

The Nvroo Structure was built by the Celestials for an unknown purpose near the creation of the Universe. It contains the most perplexing things; mostly technology so advanced that even the Remies don't know what it does.

It is very large for a structure of its age, with there being almost no development at this time. This proves that either the Celestials advanced very quickly, or that they were around before the start of our Universe.