At Aix-la-Chapelle he also built a majestic palace, surrounded by a broad columned portico, which was a marvel of architecture at that time. Rome and Ravenna furnished the columns, the marble blocks, and the mosaic work, and the best architects were sent there by the Pope. Around it were buildings for the schools, court attendants, and bodyguards; farther away, a cloister and farmhouses; and still farther off a tall structure built over the warm baths and capable of accommodating hundreds. The most majestic building of all was a minster connected with the palace by a pillared passageway, the dome of which, supported by tall columns, was adorned with a representation of Christ and the four-and-twenty elders of the Apocalypse in mosaic upon a gold background, the altars glistening with gold and silver ornaments. Everything was carried out according to the plans of the Emperor; and even when he was in the field the work went on. He devoted himself assiduously to all sacred matters. In the early morning hours he might be seen passing along the portico to the church to meditate and strengthen himself for his official duties, and at evening he returned for the same high purpose. Those who attended this hero of the spiritual when the times were opportune for deeds of peace often accompanied the hero of the sword upon his expeditions. During his first Lombard campaign he became acquainted with the pious and learned Anglo-Saxon prelate, Alcuin,[43] and took him with him that he might have the advantage of his counsels and teaching. Charlemagne, like all princes’ sons in those days, had enjoyed but little instruction up to the time he assumed the sovereignty. His native ability helped him over many hard places, but that same ability inspired him with a passionate desire to avail himself of the treasures of knowledge. The great Emperor sat, a willing scholar, at the feet of his teacher Alcuin, whom Guizot thus describes: “Alcuin was very well versed in Antonius and Hieronymus and was familiar with Pythagoras, Aristotle, Aristippus, Diogenes, Plato, Homer, Virgil, Seneca, and Pliny. His writings were chiefly theological, but he had also done much of importance in mathematics, astronomy, dialectics, and rhetoric. This man was the light of the Church in his day and was also a classical scholar.”