June 25

Sunderolt served as a leading churchman in late 9th-century Germany, holding the office of archbishop. He oversaw ecclesiastical affairs, managed diocesan administration, and convened local synods. Sunderolt maintained connections with the royal court, advising on both spiritual and political matters. His tenure saw efforts to strengthen monastic communities and clerical discipline. He died in 891, leaving a legacy of reform and dedication to the growth of the medieval German church.

Dorothea of Montau (c. 1347–1394) withdrew from society to live as a religious hermit in Prussia, seeking spiritual clarity through solitude. She tended the sick and poor during outbreaks of plague, offering both care and comfort. Accounts of her mystical visions and revelations attracted pilgrims seeking guidance. Despite lacking formal theological training, her piety earned the admiration of church leaders. Her life and writings, recorded by a local priest, contributed to her posthumous beatification. Dorothea's legacy endures in medieval Christian mysticism.

Born in 1598 near Ferrara, Giovanni Battista Riccioli entered the Jesuit order and devoted his life to astronomy. In 1651, he published the Almagestum Novum, featuring one of the first detailed maps of the Moon and introducing a lunar nomenclature still in use today. He conducted experiments on gravity and free fall that challenged prevailing scientific thought. Riccioli's work bridged religious and scientific communities, earning him respect in both spheres. He died in 1671 after a career that helped lay the foundations of modern selenography.

Nerses Bedros XIX Tarmouni (1940-2015) was the Patriarch of the Armenian Catholic Church from 1999 until his death, overseeing the spiritual needs of Armenian Catholics worldwide. Born in Cairo to Armenian parents, he was ordained a priest in 1967 and served in various pastoral and administrative roles before his election as patriarch. Tarmouni prioritized ecumenical dialogue and expanded the church's reach into the diaspora. He established new dioceses and worked to preserve Armenian liturgical traditions and cultural heritage. Known for his humility and pastoral care, he guided his flock through political and social challenges. His leadership strengthened the global Armenian Catholic community.