This is a statue of one of the Prince Bishops of County Durham, standing in the grounds of the Bowes Museum in Barnard Castle (http://www.thebowesmuseum.org.uk/)
“There are two kings in England, namely the Lord King of England, wearing a crown in sign of his regality and the Lord Bishop of Durham wearing a mitre in place of a crown, in sign of his regality in the diocese of Durham”.
This is a quote from the steward of Anthony Bek, Bishop of Durham (1284 - 1311).
You can find out more here: http://www.englandsnortheast.co.uk/PrinceBishopsDurham.html
