Threemasons

The Threemasons were a highly exclusive and secretive council of schizophrenics who busied themselves with spreading the gospel of 3. No, there was no special sacriligious text known as the 'gospel of 3'. The Threemasons simply found the number 3 to be incredibly spritiually satisfying and sought to enlighten their fellow man and alien on the extraordinary splendour of 3. 
The Threemasons met in three-sided pyramids known as 'Thremples'. However, the Threemasons were unaware that a three-sided object in the third dimension was fundamentally impossible, and thusly they were in reality warshipping in four-sided pyramids. When this was found out, a great hubbub was had, resulting in the exection of 18 burmese mountain lions. 
It was through this same logic, though, that famed Threemason Founder Thresaguilers (333,333 BB- 333,331 AB) determined the Bass Pro Shops Pyramid to have be in fact a five-sided object (four sides above ground and the floor). This unfortunately spurred a massive exodus from the Threemason society, with many believing that to have been a divine sign that Five, not Three, was the Holiest of numbers. This was backed up by the Five Warden, and many former Threemasons relocated to Ghetsin 5 in order to warship their new favorite number.