You care a lot about heritage and its significance is obvious to you. But that is not the case for everyone, and you should never assume others share or even understand your passion.
Here are some tips for building stronger relationships:
A hard truth is: making a case is not actually about you and your organization. It is about helping others to find solutions for their needs and problems. For example:
Your mayor will likely be sympathetic when you say you are overworked and understaffed, but that has nothing to do with running a local government on a tight budget. But, if you can demonstrate how your museum draws people to your community and contributes to the quality of life and the local economy, you are supporting the mayor’s issues. Increased staffing means increased capacity and that might make good business sense for increased funding.
Advocacy for Arts Organizations: A Toolkit for Engaging in the 2018 Provincial & Municipal Elections (source)