The 16th century authors I mentioned say:If we are going to use different definitions than what is commonly used, it is deceptive not to tell the reader that fact, and gives a false impression, and it makes any comparison meaningless.
If Evora was only 11,000 and Mbanga Congo was a similar size according the Portuguese who visited it, and Mbanga was maybe the second largest city in Sub Saharan Africa, then the cities in Sub Saharan African at the time don't seem that big.
size: 10 miles
Population: 100 000 inhabitants.
I don't think the numbers are 100% exact though.
If I remember right the ones who mentioned Evora, visited Mbanza Kongo in 1491. The description I posted is from 1578. This book from 16th is a very detailed description of the city, the kingdom, its provinces, culture, ethnicities and history. All through the eyes of two 16th century europeans.
What makes classic Athens or Uruk cities?What would make the Great Benin classified a city at all? Putting a wall around an area doesn't make all the area enclosed one city, anymore than the Great Wall of China means we should regard China as one supercity.
Having walls around a region does not make it a city.