Duchy of Westphalia
It was located in the greater region of Westphalia , originally one of the three main regions in the German stem duchy of Saxony and today part of the state of North Rhine-Westphalia . 
<triplet> Westphalia <subj> North Rhine-Westphalia <obj> located in the administrative territorial entity <triplet> Saxony <subj> stem duchy <obj> instance of <triplet> North Rhine-Westphalia <subj> state <obj> instance of