Just so you know: osteopathy has a very different meaning in the USA, than it has in Europe (at the very least in the Netherlands, where I'm from, but I think the case is the same for Germany and France )
In the USA, if I'm not mistaken, being a Doctor of Osteopathy means that you have a skillset very close to a Medical Doctor. So osteopaths are often trained in actual evidence based medicine. (Again, like Robert said, check it the Sawbones podcast, they have a pretty good breakdown on the differences).
Over here in Europe, osteopathy is a specialization often taken by people who may have a background in physical therapy. European osteopathy sticks a lot closer to it's snake-oil roots, when compared to American osteopathy, and is much more comparable to chiropraxy.
As a profession, it is not protected in many European countries. So best case scenario , you get a good PT with some funny ideas, but worst case, people have been injured or killed by people claiming to be osteopaths.