Before the Europeans invaded African nations the native people had not built a multi story building or a boat other than a canoe,
I'm aware of this in relation to Sub-Saharan Africans. I'm not certain if they had the wheel either in most of those nations. Also they may have had cattle but Africans in that latitude didn't master beast of burden concepts well either. Perhaps only the the ancient Ethiopians and Nubians had any level of technology by proxy of their locations bordering Egypt.