Each basilica is entitled to have it's own coat of arms. The unique Coat of Arms of St. Joseph Basilica signifies its allegiance to the Vatican and the Diocese of Worcester and reflects on the tradition of the parish.
The top portion of the Coat of Arms depicts the ombrellino, which is the symbol of a basilica. The keys represent the jurisdiction of the Holy Father to whom the basilica belongs. The red and white colors of the shield represent the Polish national colors, while the eagle is a symbol of our country. The carpenter's square located on the red base represents St. Joseph, the patron saint of the parish. The red plate was chosen to identify with the colors of the Diocese of Worcester, Massachusetts. The motto in Latin "In Caritate et Unitate" (In Charity and Unity) beautifully describes the mission of the St. Joseph Parish community.