This is a representation of the coat of arms of the Roman Catholic Diocese of Peoria.
Azure, on a cross throughout and in the first quarter a mullet of eight points Or, a calumet fesswise between two fleurs-de-lis in pale of the field.
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 Fleur de lys.svg by Yorick (talk · contribs)
Own work
Alekjds