The beauty of Milan, with its stately Castello and white marble Duomo, its spacious streets and long rows of armourers' and goldsmiths' shops, its beautiful gardens and frescoed palaces, made a deep impression upon these strangers from the North. Never had they seen so fair a city or so rich a land. Marvellous were the tales they had to tell their countrymen of the splendid court where they had lived like princes, and of this wealthy and magnificent Signor Lodovico, who had entertained them in so royal a manner. But although the investiture of Genoa had been provisionally granted, and a treaty of alliance agreed upon, several articles of the league still remained to be discussed. Negotiations dragged on all through the year, chiefly with regard to certain castles belonging to Charles's ally, the Marquis of Montferrat, which had been seized by the Milanese. Niccolo da Correggio was sent to France in the summer to endeavour to bring matters to a satisfactory conclusion, but nothing was finally settled until the winter, when Charles decided to send a second embassy to Milan. This time one of the former envoys, Jean Roux de Visque, was selected for the office, and, together with Le Sieur Pierre de Courthardi, left Paris early in December, and arrived at Milan in January, 1492. Lodovico himself received the ambassadors in the Castello, and entertained them with his wonted magnificence. A treaty was drawn up, by which Charles agreed to recognize all the claims advanced by the Duke of Milan, and admitted the Duke of Bari by name as governor of his nephew into the defensive and offensive league concluded on the 13th of January, and on the 19th the French ambassadors left Milan. Before their departure, however, Lodovico, anxious to do his guests honour and at the same time impress them with his wealth and the vast resources at his command, himself conducted them over the Treasury of the Castello, which was deservedly regarded as one of the principal sights of Milan.