This is a representation of the coat of arms of the Roman Catholic Archdiocese of Dubuque.
Blazon: Argent on a bend wavy Azure between two crosses-crosslet Gules three fleurs-de-lys palewise 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:Bosnian Lily.svg by DzWiki (talk · contribs)
 File:Coa Illustration Cross Crosslet.svg by Madboy74 (talk · contribs)
Own work
Alekjds