The Augustinian secular theologian Henry of Ghent, traditionally known as Doctor Solemnis, was born at Ghent or Tournai, probably in the second quarter of the thirteenth century. In addition to holding high ecclesiastical office at Bruges and Tournai, he taught both arts and theology at the University of Paris. In 1277 he served on the theological commission that prepared the condemnation issued by Stephen Tempier, bishop of Paris, against the Averroism of Siger of Brabant and Boethius of Dacia. He died in 1293.

Henry's principal writings are a Summa Theologica and fifteen Quodlibeta (occasional disputations). The extended criticism of his ideas by John Duns Scotus, William of Ockham, and others is a sign of his considerable influence in his own age. In the sixteenth century the Servite friars chose him as their official theologian, although he had never belonged to their order.

As a...