This is a representation of the coat of arms of the Personal Ordinariate of the Chair of Saint Peter.
Per pale gules and azure, two keys in saltire or, debruised by a sceptre flory of the third in pale sprouting three fleurs-de-lis petaled argent and stemmed of the third ([1]).
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:Meuble héraldique Clefs.svg by Zigeuner (talk · contribs)
 File:Fluntern-blazon.svg by Gerhard Bräunlich (talk · contribs)
Own work
Alekjds