This window is a group of three lancet windows behind the altar. The chancel window was a gift of Mrs. James S. (Fannie) Peironnet, depicting the Sacraments of Baptism and Communion. The wheat and grape motifs represent the bread and wine of The Eucharist. The symbols of Alpha and Omega represent the Beginning and the End.
The Peironnets were early members of the Trinity mission church. Mr. Peironnet was a prosperous lumberman in Peru, IL before he came to the Chicago area to begin an investment firm, J. S. Peironnet & Co., which became a well respected member of the Chicago Board of Trade. James Peironnet served as the second mayor of Wheaton from 1893-98 and again in 1901-04. Two great grandchildren of James Peironnet are current members of Trinity: Mrs. Peter (Lois Rathje) Boecker and Justice S. Louis Rathje.