The moat that surrounded Tabríz, where the Báb's body was thrown?

Sep 2011
190
Russia
#1
Here is a picture of the site of the moat that surrounded Tabríz, where the Báb's body was thrown: Bahá’í Media Bank
I don’t get it. Why was it covered? What the use of a moat if it is covered with walls and ceiling?
1505149-master.jpg
 
Sep 2010
4,461
Normanton Far North Queensland
#4
More than likely built upon later, since their bodies are thrown on the banks of the moat surrounding Tabriz.

It does now look like a market place.

Regards Tony