During that year new honours were preparing for Jacopo. Gian Galeazzo Visconti was intending to rebuild the Certosa at Pavia, and set his eyes on Jacopo da Campione as the best architect he could find for it. The Masters of the Milan Lodge dared not dispute the will of the all-powerful Duke, and held a meeting on March 4, 1397, at which it was decided "that Jacopo di Campione, chief architect of the building, _qui acceptatus est super laboreria Cartuxiæ_, should still retain his position in the works of the Duomo, because the entire absence of the Master who began the building (_qui principiavit ipsam fabricam_) would cause grave peril and injury to the work. They proposed, however, that Maestro Jacopo might, in cases of necessity, assist in the building of the Certosa, as he had done before." This document sets the question beyond a doubt that the architect who had most to do with the building of Milan cathedral was this Jacopo of Campione, who had worked with the first architect, Simone, and shared, on his death, the post of chief, with Marco, his fellow-countryman. He died on October 30, 1398. During the time he was head of the _laborerium_ several Germans worked under him; Milan being so near the German frontier was always a favourite object of German travel. Moreover, I fancy there must during these centuries have been a fraternal intercourse between the Italian Masonic Guilds and those of Germany. We have so many Italians who worked in Germany, and coming back were dubbed with the name of the last place they came from, that it is equally likely that some Germans crossed the border with those fellow-guildsmen on their return, and worked at Milan. This intercourse between the two nations would account for the more German style of Milan cathedral as compared with other Italian churches. [Illustration: SMALL CLOISTER OF THE CERTOSA OF PAVIA. _See page 358._]