[Zope] Accessing Zope Object properties

I want to put a "Last edited on <Zope Object modification date>" in a footer, so that I don't have to think about manually changing the date all the time. I've looked through the docs, but I can't find (or recognize) what I need. And it raises the general question: how do I discover and access the properties of any arbitrary Zope object for binding to variables, manipulation, etc.? TIA. Kirk