Here are the last two of Longfellow’s six sonnets about Dante. Remember, Longfellow wasn’t Catholic, he was a Unitarian. Then read Sonnet V right to its lovely end.
Sonnet VI might be pointing to Italian history of the 1800’s but I don’t know for sure. I do know that there is lots of commentary about Dante’s poetry and its effect on the Italian language. Check out lines 6-8.
I Lift mine eyes, and all the windows blaze
With forms of saints and holy men who died,
Here martyred and hereafter glorified;
And the great Rose upon its leaves displays
Christ’s Triumph, and the angelic roundelays,
With splendor upon splendor multiplied;
And Beatrice again at Dante’s side
No more rebukes, but smiles her words of praise.
And then the organ sounds, and unseen choirs
Sing the old Latin hymns of peace and love
And benedictions of the Holy Ghost;
And the melodious bells among the spires
O’er all the house-tops and through heaven above
Proclaim the elevation of the Host!
O star of morning and of liberty!
O bringer of the light, whose splendor shines
Above the darkness of the Apennines,
Forerunner of the day that is to be!
The voices of the city and the sea,
The voices of the mountains and the pines,
Repeat thy song, till the familiar lines
Are footpaths for the thought of Italy!
Thy fame is blown abroad from all the heights,
Through all the nations; and a sound is heard,
As of a mighty wind, and men devout,
Strangers of Rome, and the new proselytes,
In their own language hear thy wondrous word,
And many are amazed and many doubt.