Native american tribe responsible for building giant flat topped pyramids with stairs

Mound Builders built those, but you can find pyramids made by the indigenous people of America all across both the Americas.

Sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532. i found this information on wikipedia