This is a representation of the coat of arms of the Roman Catholic Diocese of Tulsa. (A slightly more conventional one than the one used by the diocese and ably reproduced by Jayarathina.)
The following Commons images were used to create this image:

 File:Roman Catholic Diocese of Erie.svg by Niagara (talk · contribs) (mitre)
 File:Old French Escutcheon.svg by Masur (talk · contribs)
 File:CoA Roman Catholic Diocese of Tulsa.svg by Jayarathina (talk · contribs)
Own work
Alekjds