June 20

Appointed by Emperor Otto I in 968 as the inaugural Archbishop of Magdeburg, Adalbert was a key figure in the Ottonian Church. He established the archdiocese as a missionary center for the Slavic peoples east of the Elbe River. Under his leadership, churches and monastic institutions were founded to support evangelization efforts. He worked closely with secular and ecclesiastical authorities to secure resources for his missions. Adalbert died in 981 and was later venerated as a saint in the Catholic tradition.

Born in 1291 near Donauwörth, Margareta Ebner entered the Dominican convent at Unterlinden in 1312. From a young age, she experienced intense mystical visions, which she meticulously recorded in Latin and German. Her writings include dialogues with Christ and detailed accounts of her spiritual trials and ecstasies. She corresponded with the noted mystic Henry Suso, contributing to the Rhineland mystical tradition. Margareta died in 1351 and was later beatified for her enduring spiritual legacy.

Georges Lemaître was a Belgian Catholic priest, astronomer, and physicist who first described the universe's expansion. Born in 1894, he earned doctorates in physics and mathematics before studying under Arthur Eddington in Cambridge. In 1927, Lemaître proposed what became known as the 'primeval atom' hypothesis, laying the groundwork for the Big Bang theory. His predictions of cosmic expansion preceded Edwin Hubble's observations and helped unite relativity with observational astronomy. Lemaître served as a professor at the Catholic University of Louvain, mentoring a generation of European scientists. His unique role bridging science and faith continues to inspire discussions on cosmology and theology.