• Franciscan Media. “Saint of the Day: Saint Maximilian Mary Kolbe.” Franciscan Media, franciscanmedia.org.
• Militia of the Immaculata. “Saint Maximilian Kolbe.” Militia of the Immaculata USA, militiaoftheimmaculata.com.
• Vatican News. “Saint Maximilian Kolbe.” Vatican News, vaticannews.va.
• Auschwitz-Birkenau Memorial and Museum. “Maximilian Kolbe.” Auschwitz Memorial, auschwitz.org.
• Encyclopaedia Britannica. “St. Maximilian Kolbe.” Britannica, britannica.com.

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