Today's Stational Church is the Church of St. Susanna. For information on this devotion, see Catholic Culture. I will post on each Stational Church for Lent.
Information is from the Canon Regulars of St. John Cantius:
Today's liturgy places before us three women—one in the white garment of virginity, the other in the blue mantle of chastity and the third in the purple robe of penitence. The first shows the triumph of Christ's redemption, the second, the power of faith in the coming Messiah, the third, the compassion of the Good Shepherd, who came to seek what was lost.
The first is today's stational guide—St. Susanna, to whom the vow of virginity and consecration to Christ, the royal Bridegroom, meant more than the princely hand of the unprincely Galerius Maximianus. She refused his hand in marriage and was put to death.
The other Susanna is the chaste wife of Joachim living in Babylon in the days of Daniel, the prophet. Two adulterous men, ever to be remembered as a disgrace to manhood, two judges, who perverted justice and drowned their manly honor in the pool of perjury, were this pure women's adversaries. But Susanna prefers to be a victim of the hellish vengeance of her accusers than sin against her God.
And now the third one—the woman caught in adultery. She lost her virginity, her chastity, and has broken fidelity to her marriage vows. "she must be stoned," was the cry. She was an outcast in the eyes of her merciless accusers, who themselves were whitened sepulchers inwardly full of worms. Jesus, the new Daniel, came to her rescue. He condemned her sin, but raised her from an erring sheep to a penitential follower. "Has no one condemned you, woman? No one, Sir. Neither will I condemn you. Now sin no more."
Let us pray: Extend to Thy faithful the right hand of heavenly help, that they may seek Thee with their whole hearts and deserve to obtain what they ask for worthily. Through Christ, Our Lord. Amen.