Hi, this looks very much like a Galliform bird. Could be a large domestic fowl, a peacock (or a pheasant?). The depth of the pneumatic foramen is not visible in the photo.
If you lack modern comparative specimens take a look in:
Tersa Tomek & Zbigniew M. Bochenski 2009, A key for the identification of domestic bird bones in Europé: Galliformes and Columbiformes
http://www.isez.pan.krakow.pl/en/books.html
Leif Jonsson / Gothenburg Museum of Natural History
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