• Sisters of the Blessed Sacrament. “Saint Katharine Drexel.” Sisters of the Blessed Sacrament, katharinedrexel.org.
• The Holy See. “Katharine Drexel (1858-1955): Biography.” Vatican website, vatican.va.
• Franciscan Media. “Saint of the Day: Saint Katharine Drexel.” Franciscan Media, franciscanmedia.org.
• United States Conference of Catholic Bishops. “Saint Katharine Drexel.” USCCB, usccb.org.
• Encyclopaedia Britannica. “St. Katharine Drexel.” Britannica, britannica.com.

Slides are written from The Acutis Project research packet for St. Katharine Drexel, which draws on the sources above. Photo credits appear on each picture.