Hieromartyr Mark, Bishop of Arethusa, who suffered under Julian the Apostate - Troparion & Kontakion
Troparion — Tone 3
In preparation for the contest, you anointed an assembly of martyrs / and bolstered them by your steadfastness, O glorious Mark. / You finished your course together with them / and all of you were found worthy of the joy of heaven. / Righteous father, entreat Christ our God to grant us His great mercy.
(The Typikon does not prescribe a Kontakion.)