The current shield of the Diocese of Fond du Lac is the second such shield and was adopted during the episcopate of Bishop Brady. Evolved from the coat of arms historically used in the mid-12th century to identify allies, the use of shields has expanded. The design is a unique symbol and many shields are still in use by a variety of institutions and individuals. As with all shields, it is meant to convey a number of meanings.
This shield was included in the book Heraldry in the Episcopal Church: How ecclesiastical coats of arms depict the history of the church (1993) by Eckford De Kay and published by Acorn Press.