O God, You crowned with the wreath of immortality the strife of the Blessed Martyrs John and his Companions for the faith mercifully grant that, fighting here on earth, we may likewise deserve, through their merits and after their example, to be crowned with them in heaven. Through Christ our Lord. Amen.
(Dominican Saints of the Rosary Series) 

Hymn to Saint John of Cologne:

Of all Thy warrior saints, O Lord,
The portion, crown and great reward:
From all transgressions set us free
Who sing Thy martyr’s victory.

The pleasure of the world John spurned
From sin’s pernicious lures he turned;
Accounting them as passing all,
He reached at length Thy heavenly hall.

For Thee through many a woe he ran
In many a fight he played the man,
For Thee his blood was glad to pour
And thence has joy for evermore.

We, therefore, pray Thee, full of love,
Regard us from Thy throne above:
On this Thy martyr’s triumph day
Wash every stain of sin away.

Long as unending ages run,
To God the Father praise be sung,
To God the Son our equal praise,
And God the Holy Ghost, we raise.