ملف:Coat of arms of Sean Patrick O'Malley.svg

English: Coat of Arms U.S. Cardinal Seán Patrick O'Malley, Archbishop of Boston.

Fuente: www.bostoncatholic.org

Blazon: Arms impaled. Dexter: Azure, a cross fleurettee Or; issuant from a base bary wavy of five, of the first and Argent, a mount of three coteaux of the second. Sinister: Gules, a ship of three masts, at sail, Or, between three stars Argent; on a chief of the third the arms of the Franciscan Order; upon a Latin cross Sable two arms in saltak, the one to dexter uncovered and the one to sinister habited of the Order of St. Francis, both hands displaying the Stigmata, all Proper.

Episcopal Motto: For his motto, His Eminence, Seán Cardinal O'Malley, O.F.M., Cap, has retained the phrase "QUODCUMQUE DIXERIT FACITE," which is taken from Saint John's Gospel, Chapter 2, verse 5 and comes from the Blessed Virgin's statement at the wedding feast at Cana, "Do whatever He tells you," This statement by Mary, the first disciple, "the first Christian," sums up the totality of the human commitment to Christ, regardless of what it may be, we are to do "whatever he tells us."

Two special charges have been added to Cardinal O'Malley's design to signify very special honors that His Excellency has received.

The shield of the Cardinal's design has been replaced by the red and silver "Cruz de Cristo" to signify that Cardinal O'Malley was named a Knight Commander of the Order of Prince Henry the Navigator in 1974. This honor was conferred upon the Cardinal by the Portuguese government for outstanding service to the Portuguese people.

Additionally, it will be noted that the Cardinal's shield also rests upon a Maltese Cross in its proper colors of red and white. The inclusion of this cross in the design signifies that at the request of His Eminence James Cardinal Hickey, then Cardinal-Archbishop of Washington, DC and Chaplain of the Washington Lieutenancy of the Sovereign Military Order of Malta, Cardinal O'Malley was named as a Chaplain "Ad Honorum" of the Order in 1991. By this position the Bishop became a member of one of the oldest chivalric order in Christendom, the Hospitaliers of St. John of Jerusalem, who, at one time, had their headquarters on the Island of Malta (the headquarters are now In Rome) and have thereafter been known as the Knights of Malta.