Theresienmesse
XXII/12 ) is a mass in B-flat major written by Joseph Haydn and named after Maria Theresa of the Two Sicilies , empress consort of Francis II . 
<triplet> Maria Theresa of the Two Sicilies <subj> Francis II <obj> spouse <triplet> Francis II <subj> Maria Theresa of the Two Sicilies <obj> spouse