During the millennium of the Holy Roman Empire, several specific attempts were made to recall the Empire's classical heritage. Emperor Otto III reigned from Rome from 998 to his death in 1002, and made a short-lived attempt to revive ancient Roman institutions and traditions in partnership with Pope Sylvester II, who chose his papal name as an echo of the time of Constantine the Great. Frederick II took a keen interest in Roman antiquity, sponsored archaeological excavations, organized a Roman-style triumph in Cremona in 1238 to celebrate his victory at the battle of Cortenuova, and had himself depicted in classical imagery. Similarly, Maximilian I was highly mindful of classical references in his "memorial" projects of the 1510s that included the three monumental woodblock prints of the "Triumphal Arch", "Triumphal Procession" and "Large Triumphal Carriage".