St Quadratus was a Disciple of the Apostles, and became Bishop of Athens. According to the Synaxaristes, he contested for the Christian faith in the year 117 AD, in the reign of Hadrian (117-138 AD), but according to others, in the reign of Marcus Aurelius (161-180 AD).
Dismissal Hymn (Third Tone)
O Holy Apostle Quadratus, intercede with the merciful God that He grant to our souls forgiveness of offences.
Kontakion (Plagal of the Fourth Tone)
As a most honoured hierarch and athlete of great fortitude, the world offers Apostle Quadratus to You, O Lord most merciful; as with hymns it honours his all-venerable memory, it asks of You through him to grant forgiveness of failings to them that sing his praise.