This is a representation of the coat of arms of the Roman Catholic Archdiocese of San Antonio.
Azure, on a cross quadrate argent a Tau-cross of the field, in dexter canton a star of the second.
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:Te cross red.svg by Eugenio Hansen, OFS (talk · contribs)
Own work
Alekjds