Hey, another lurker hoping to help out. I think I have an idea for the tribute that will allow it to last for a long time. At least two techs before the first of the wonders related to Constantinople, add the tribute improvements; they should each cost no shields and need not require each other as prerequisites, but each one must be a prerequisite to a certain Constantinople wonder. On the very next tech, make these tribute buildings obsolete. This way, they must be built by the end of the tech in which they become available, yet they cannot be razed until the wonders they are needed for are built. I have loved playing your mod; keep up the amazing work.