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They used lots of very large, very heavy stones.

You will note that these constructions did not have large internal air pockets relative to volume. They qualify as monuments or fortifications more than inhabitable buildings with a decent amount of floorspace.

Having arches or domes or any large enclosed internal space was considered the highheight of engineering achievement - and most did not survive well. The internal space of an Egyptian pyramid was a fraction (1.3%) of a modern pyramid like the Louvre skylight (probably 99.5%).

They used lots of very large, very heavy stones.

You will note that these constructions did not have large internal air pockets relative to volume. They qualify as monuments or fortifications more than inhabitable buildings with a decent amount of floorspace.

Having arches or domes or any large enclosed internal space was considered the high of engineering achievement - and most did not survive well. The internal space of an Egyptian pyramid was a fraction (1.3%) of a modern pyramid like the Louvre skylight (probably 99.5%).

They used lots of very large, very heavy stones.

You will note that these constructions did not have large internal air pockets relative to volume. They qualify as monuments or fortifications more than inhabitable buildings with a decent amount of floorspace.

Having arches or domes or any large enclosed internal space was considered the height of engineering achievement - and most did not survive well. The internal space of an Egyptian pyramid was a fraction (1.3%) of a modern pyramid like the Louvre skylight (probably 99.5%).

1
source | link

They used lots of very large, very heavy stones.

You will note that these constructions did not have large internal air pockets relative to volume. They qualify as monuments or fortifications more than inhabitable buildings with a decent amount of floorspace.

Having arches or domes or any large enclosed internal space was considered the high of engineering achievement - and most did not survive well. The internal space of an Egyptian pyramid was a fraction (1.3%) of a modern pyramid like the Louvre skylight (probably 99.5%).