The mural crown (corona muralis) was the decoration of the soldier who was the first to scale the walls of a besieged city, and was usually a circlet of gold adorned with a series of turrets.
CREST: On a Wreath of the Colors a Horse rampant argent gorged with a Mural Crown Gules.
CREST: Out of a Mural Crown Or a Lion's Head Azure maned Gold collared Ermine, Mantled Gules doubled argent.
Crest: Out of a mural crown Gules a bear's head argent.
The mural crown is a common symbol of civic government and the ram links the arms with the County.