In Milan, Castruccio meets Galeazzo Visconti, the son of Matteo Visconti. Castruccio first notices the wealth of Milan: "It was a scene of gaiety and splendour. The young nobles were preparing to attend on the emperor in a royal hunt. They were attired with the utmost magnificence, with full dresses of embroidered silk, cloth, or velvet, and cloaks of precious furs; some were accoutred in short gowns with trowsers tied in the same manner as that of Pepi, but made of fine linen and embossed silks; their collars were ornamented with strings of pearl" (117). Galeazzo eventually succeeds his father as being the leader of the Milanesse.
According to Britannica: Gian Galeazzo united all the Visconti dominions in his own hands and further amplified them by his military power and his clever manipulation of rival cities. An able administrator, he aimed at transforming his territories into a united state, and encouraged the training of government officials at the University of Pavia. During the second year of his reign, the building of the cathedral of Milan was begun, and in 1396 he founded the celebrated Carthusian monastery, the Certosa di Pavia. He was strongly influenced by the poet Petrarch, who had lived at Galeazzo II’s court and had directed the collection of the Visconti library.