I was watching House Hunters and it was taking place in Jackson, Mississippi (it's the capital city of that American state, apparently, and, also apparently, Mississippi is not just a river). In the opening sequence they showed what looked like a WW1 gun. Well, a deft bit of googling revealed these:
Looks like a 15cm sFH Lang to me. It's in pretty good condition. The gun was made by both Krupp and Rheinmetall, there are minor differences, but to be sure which manufacturer you need an image of the breech markings.
The howitzer is a German 15cm lg.s.F.H. 1913. I have one of this type that is currently un-restored. I also have a re-stored 15cm lg.s.F.H. 1913/02 that is very similar except for the shield hinge, loader sear and spade. This is the link:
There had also been a German 7,7cm l.F.K. 1896 n/A sitting on the opposite side of the lawn from this 15cm. Also in the same area is a French 40 and 8 rail car.