I don't know why the great pyramids were constructed but surely they were not mere tombs.
Also the rain water erosion marks on the sphinx are very telling, the sphinx and also the great pyramid maybe very old structures probably having nothing to do with the egyptian civilization as we know it.
Imagine your descendant, Harsh86_Patel the 25th, 2000 years from now making the comment that Occam's Razor goes against the possibility that St. Peters Basilica was built just to worship a single deity. Why would so many waste so much time (120 years) and energy to build such a huge structure for that purpose. Logic and common sense goes against this premise.
Edited by Quaentum, 10 April 2013 - 02:49 PM.