Cologne
Cologne (German: Köln) is a city located in Germany, itself historically a part of the Holy Roman Empire. Throughout the Renaissance, the city received visits from members of the Roman Assassins Guild.
Renaissance
The Assassin apprentices sent by Ezio Auditore da Firenze from Rome traveled to Cologne to meet with Conradus Celtis, a scholar who had discovered begun to uncover the existence of the Assassin Order through his thorough research. The Assassins managed to persuade him of the need to keep their existence secret, and Celtis agreed to keep his research hidden.[1]
Not long after that, Elector Friedrich der Weise decided to found a school in Cologne. This school would question the activities of the Borgia, and its leading member, Pope Alexander VI. The Borgia arranged for a large bribe to be given, in exchange for the cancellation of der Weise's plans. The Assassins learned of the bribe and intercepted the guards that were to delivering the money. After obtaining the money, the Assassins anonymously donated it to the school.[1]