A "Wiener Schnitzel" is typically veal meat. (But if you dont like that it can also be turkey or pork).
The Schmalz is pretty rich in calories, so even in Austria you usually use veg-oil instead. At least at home.
Where the some sort of Schnitzel comes from is not entirely clear, most likely from Italy. The "Schnitzel" as most of us know it nowadays is from Austria (= this recipe - wouldnt know any Austrian, who does it in another way).
But especially Germans have their own way to do a Schnitzel. There are various recipes in Germany, most of them not much to do with our Schnitzel.
Here´s the original. :)