How come and the most constructions and buildings around the world were built from white men?

you have forgotten about the Egyptian Pyramids and the Mayan Ruins. Egypt was pretty black back in the day. and of course South America was yet to be 'discovered' by the white man. that is just two examples i can think of offhand. Also, remember the Turkish Empire stretched as far as Spain back in the 1100 and they built quite a lot of buildings that is still some form or the other in existance today. So no, your umption that great buildings where built by white people are largely inaccurate as they were still only perhaps bathing once a year and living off potatoes when the rest of the world was putting up great buildings.