Final answer:
Desiderius Erasmus is renowned as the best known Christian humanist, advocating for religious and moral reform through education and personal piety within Northern Europe's religious landscape.
Step-by-step explanation:
The best known of all Christian humanists was Desiderius Erasmus. Erasmus promoted a philosophy that combined classical learning with the Christian faith and encouraged a reform of the Church by developing personal piety and inner spirituality. His belief in the power of education to bring about religious and moral reform sets him apart as a leading figure within Christian humanism. Although figures such as Thomas More, Martin Luther, and John Calvin are notable for their contributions to religious thought and reform, it is Erasmus who is commonly regarded as the most famous Christian humanist.
Christian humanism developed primarily in Northern Europe, particularly during the Northern Renaissance, which sought to use the study of classical texts and the early Christian fathers to reform the Church and deepen spirituality.