This page is an example of the types of historical information available for a site / event. There is no single source that tells the full story, so you will need to read through the resources and determine what story you want to tell.
The City Hall and Fire Station building is over 100 years old, and there are many stories that happen over time. Reading through the items linked in the documents section, I found the following stories:
Remember that you cannot tell the ENTIRE story - 100 years of history is too much. Chose one story to tell, include n a date so your users will know when the story takes place, and be sure be accurate and factual with the information you present.