How to get axes limits of subplot ?

Hi,

I'm new to matplotlib and I have a question regarding axes.
Once I created some axes (either with the axes() command or with subplot() ), how can I later find out the limits (left bottom, width, height) of the axes ?
Maybe some trick with get() ?
Btw. is there somewhere a list of properties that I can get/set with get() or set() ?

    Many thanks,

                     Axel