Little data is known of who or what the Architects were. What is known is that they possessed knowledge and technology far more advanced than mankind when they arrived. Some records and artifacts recovered from this era of humanity seem to infer the Architects were far from any humanoid shape or morphology.
Why the Architects came to mankind is unknown, however it is believed by the Shaddai Orthodox, that there is a mistranslation within ancient records. The Orthodox argues that mankind was not the inheritor of Architect’s technology, but rather the descendants of the Architects; implying mankind was created or is somehow biologically related to the Architects. Whether or not this is true remains unsolved.