Nicholas of Cusa was noted for his deeply mystical writings about Christianity, particularly on the possibility of knowing God with the divine human mind - not possible through mere human means - via "learned ignorance".
Theologically, Nicholas anticipated the profound implications of Reformed teaching on the harrowing of Hell (Sermon on Psalm 30:11), followed by Pico della Mirandola, who similarly explained the descensus in terms of Christ's agony.