Here is an old paper from the American Oriental Society on the history.
http://www.jstor.org/pss/3087601
Alright, while I have to join up or something to read the entire thing, I can see where this is going : It’s a “Beacon of Light”, yet there is nothing on it to suggest any light (Not flames or anything at the top)
I’m thinking that it’s an attempt to see the mosque from miles around (like ever other ancient pyre design).
I’m looking to see if there is a connection to the presence of a Minaret and the conquest of the land that the mosque was cobbled together upon (From Garbage.. Let my disdain for Islam be known)