Her father, seeing her holiness, used to say that she would surpass all other women of royal race (Epistle, Communion). She married Denis I, king of Portugal.
She had received the prerogative of re-establishing peace where there had been divisions and of mitigating the fury of war (Collect). When she became a widow she took the habit of the Third Order of St. Francis, distributed her riches and acquired at this price the precious pearl and the hidden treasure of life everlasting (Gospel). She died at Estremos in 1336 and her body has remained incorrupt.
Cognovi, Domine, quia aequitas judicia tua, et in veritate tua humiliasti me: confige timore tuo carnes meas, a mandatis tuis timui. * Beati immaculati in via, qui ambulant in lege Domini.
I know, O Lord, that Thy judgements are equity, and in Thy truth Thou hast humbled me: pierce Thou my flesh with Thy fear, I am afraid of Thy judgements. * Blessed are the undefiled in the way, who walk in the law of the Lord.
(Psalm 118:75 and 120:1 from the Introit of Mass).
Clementissime Deus, qui beatam Elisabeth reginam, inter ceteras egregias dotes, bellici furoris sedandi praerogativa decorasti: da nobis, ejus intercessione, post mortalis vitae, quam suppliciter petimus, pacem, ad aeterna gaudia pervenire.
O most merciful God, who didst endow the blessed queen Elizabeth among other excellent gifts, with the privilege of appeasing the fury of war; grant us by her intercession, that after peace in this mortal life, which we humbly implore, we may attain eternal joys.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/05391a.htm