In the fourth century pilgrims from distant lands came to pray at the tomb of these saints, whose relics are still preserved in Calahorra Cathedral.

At Santander, Alfonso II of Aragon founded the abbey of Saints Hemeterius and Celedonius, or Santander Abbey, where the heads of those holy martyrs were kept.
 The toponym "Santander" actually takes its name not from Saint Andrew as some, misled by the sound of the name, believe, but from Saint Emeterius (Santemter, Santenter, Santander), one of the patrons of the city and ancient abbey, the other being Saint Celedonius.
The former abbey church is now Santander Cathedral.

They are patron saints of Calahorra, Santander, and other towns of Cantabria.
 Their feast day is August 30.
In the fourth century pilgrims from distant lands came to pray at the tomb of these saints, whose relics are still preserved in Calahorra Cathedral.
At Santander, Alfonso II of Aragon founded the abbey of Saints Hemeterius and Celedonius, or Santander Abbey, where the heads of those holy martyrs were kept.  The toponym "Santander" actually takes its name not from Saint Andrew as some, misled by the sound of the name, believe, but from Saint Emeterius (Santemter, Santenter, Santander), one of the patrons of the city and ancient abbey, the other being Saint Celedonius. The former abbey church is now Santander Cathedral.
They are patron saints of Calahorra, Santander, and other towns of Cantabria.  Their feast day is August 30.
Emeterius and Celedonius