Here are the 12 people that Dante puts in the inner circle of the Sun, the 4th Sphere:
St. Thomas Aquinas (1225-1274)
Albertus Magnus, Aquinas’ Teacher. (1193/1206 – 1208)
Graziano (c.1075/80 – 1146/47)
Peter Lombard (c.1100 – 1160)
Solomon (c.970BC – 931BC)
Dionysius the Areopagite (c.60/c.500)
Orosius (c.380-417)
Boethius (475/77 – 524/6)
Isidore of Seville (559-636)
Bede (c.673 – 735)
Richard of St. Victor (c. 1110-1173)
Siger of Brabant (c.1240-1284)
In total six people are from the Golden Age of Monasticsm 1100-1300 AD;
Aquinas, Albert Magnus, Graziano, Peter Lombard, Richard of St. Victor, Siger of Brabant.
One is from the Old Biblical Stories – King Solomon
Five are from Late Roman/Classical time;
Orosius, Boethius, Isidore of Seville, Bede and Dionysius.