The old St. Basil Hymnal, from the Basilian Fathers in Toronto, in editions from the 1890s through 1953, was not the least bit shy about commemorating this.
I don't have all the words in my memory, but here is at least part of the hymn for that commemoration:
The clouds hang thick o'er Israel's camp
as dawns the battle day;
Arise, bright Star of Dominic
and chase the gloom away;
And where the foemen fiercest press,
thy glory may we see:
Shine o'er the banners of thy sons
and lead to victory!
See o'er Lepanto's waters spread
the Moslems' dark array!
A voice to Christendom went forth
and gave the word to pray:
Jesus! Mary! Names of strength
invoked and not in vain:
They conquered in our hour of need,
and conquer shall again!
As Pius* then to Europe spake
so Leo** speaks once more:
The Rosary our weapon still
to wield in Holy War
Sorry, can't remember the last couple of lines!
Pius in this hymn: Pope St. Pius V, of course;
Leo: I presume is Leo XIII.
Where did you get that text? Memory?
I'm impressed by your memory! And I hadn't thought of the St. Basil Hymnal for years. I remember seeing it in a few churches in the Northeast during the 50s and into the 60s (battered, worn copies).
Thanks for posting the hymn. Excellent. We must bring it back. Maybe that hymn-playing Baptist pastor will put it on his website.