This is a representation of the coat of arms of the Roman Catholic Diocese of Norwich.
Blazon: Sinople, Shamrock of Ireland field Or, tower Argent masonry and cross Sable, surmonted by five rays Argent. .
The following Commons images were used to create this image:

 File:Tower Argent masonry and cross Sable (heraldry).svg by hull19 (talk · contribs)
 File:Five rays Argent (heraldry).svg by hull19 (talk · contribs)
 File:Shamrock of Ireland Or (Heraldry).svg by hull19 (talk · contribs)
 File:Roman Catholic Diocese of Fall River.svg by Alekjds (talk · contribs) (mitre)
 File:Old French Escutcheon.svg by Masur (talk · contribs)
Own work
Hull19