Church Anniversary 42 Years

We are a small church and being the only paid employee other than the pastor a lot of the planning for events falls on me. Do you have some ideas for decoration and/or theme that we could use? Financially we are not able to spend money so any idea would have to be able to be used with things we already have or items we can borrow or "find in nature." Our celebration is the 14th of January so I don`t have a lot of time. Any input would be greatly appreciated.