Six onion-roof towers supporting heavens

[bi3mw]

In the late Middle Ages, the Mamluks ruled Jerusalem. The map shown by @Nablator in post #36 most likely depicts a Mamluk minaret (left), which Sebald Rieter would have seen in 1479. However, the onion domes are probably just his interpretation from a European perspective. 

Here are two examples of Mamluk architecture in Jerusalem:

A Minaret
   

Domed public fountain (sabil) for travelers, pilgrims, and city residents.
   

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( Mamluk Jerusalem: An Architectural Study )