Bulgarian Coat of Arms

There is lots of history behind this Bulgarian Coat of Arms, with much debate as to changes made throughout. How long to the next modification?

Bulgarian Coat of Arms The coat of arms of Bulgaria consists of a crowned golden lion rampant over a dark red shield; above the shield is the Bulgarian historical crown. The shield is supported by two crowned golden lions rampant; below the shield there is compartment in the shape of oak twigs and white bands with the national motto "Unity renders power" www.investbulgaria.com