It is certain that Dante studied the regular curriculum of medieval education, the so-called seven liberal arts, consisting of the Quadrivium and the Trivium.[3] He knew Latin, but no Greek; he quotes frequently Vergil, Horace, Statius, and others. He was a profound student of philosophy and theology; loved art, music, and poetry. In the Divine Comedy he shows a wide knowledge, embracing practically all the science and learning of the times. All this he largely taught himself, especially in his early life. Later he visited the universities of Padua and Bologna, and probably Paris. It is quite unlikely that he got as far as Oxford, as Mr. Gladstone endeavored to prove some years ago. He was not unacquainted with military life, having been present at the battle of Campaldino and at the surrender of Caprona. He was married before 1298 to Gemma Donati, and thus became related to one of the most powerful families in Florence. Here again he shows a strange reticence, never mentioning his wife or children. We have no reason, however, to believe his marriage unhappy, or that he lacked affection for his children. It is true that his wife did not follow him in exile, but there was reason enough for this in his poverty and wandering life. The apotheosis of Beatrice need not presuppose lack of conjugal affection, for his love for her was entirely Platonic and became later a mere symbol of the spiritual life. He had by Gemma several children, two sons, Pietro and Jacopo, and one daughter, Beatrice; that he had another daughter, named Antonia, is probable, but not certain. His children joined him later in life in Ravenna.