Choir of Thorns: Head to the room shown in the map above and double jump up the upper left corner. Dash double jump to the right until you reach this chest.

Location: Mother of Mothers
To the right of the fast travel room.

Location: Crown of Towers
Can be bought from the traveling merchant to the left of the entrance to Basilica of Absent Faces for 17500 Tears of Atonement.

Location: Crown of Towers
You'll need to return here after unlocking the double jump ability. Destroy the floor in the upper left corner of this room with the Weight of Sin to reveal this chest.

Location: Profundo Lamento
In the room to the left of the elevator at the top.

Location: Ravine of the High Stones
It'll be hard to miss this one. You'll find it near the start once you climb up after passing the first prie dieu.

Location: Profundo Lamento
You'll have to Lift the Curse of the Unforgiven to unlock this. It takes several steps so refer to that page of the guide for a detailed description on how to do it.

Location: City of the Blessed Name
Climb up to the top of the room where you initially dropped into Profundo Lamento and you'll find a bell. Ring it and drop down. Head towards the ladder towards the blood upgrade room and jump into the small gap to the right of the ladder. Go through the door as it opens from the shockwave of the bell for this prayer.

Location: Profundo Lamento
You'll first need to get the Lullaby of the White Shore in Crown of Towers. Then bring it to the grieving mother in Profundo Lamento. Go to the lower left prie dieu, exit that room to the left, drop down, and take the first exit to the left. Give that lullaby to the grieving mother and complete the dream sequence to be rewarded with this prayer.

Location: Streets of Wakes
Can be bought from merchant in this location for 6000 Tears of Atonement.

Location: Grilles and Ruin
At the first split in the path of this area, take the path to the right. The very next room will have two ladders in it. The prayer will be down the right ladder but you have to climb down the left ladder to open the door blocking the prayer.

Location: City of the Blessed Name
Can be bought from the traveling merchant in right side of the City for 3000 Tears of Atonement.

Location: Crown of Towers
Return here when you get the double jump ability and ring the bell with your Veredicto to drop down and open this chest.

Location: Mother of Mothers
This is in the lower right corner of Mother of Mothers. From the start, just go right and keep hugging the right wall as you go down until you reach this room.

Location: Sacred Entombments
Head to this room and use the Weight of Sin ability to cut open the wall in the lower right. Open the chest for this prayer.

Location: Labyrinth of Tides
From the second prie dieu go to the left until the path splits and go up. It'll be behind the door to the left. Pray at the statue to the far right to open it up.

Location: Two Moons
Bring the Holy Oil of the Everlasting Anointment to Yerma in Two Moons before you fight Svsona, Fermosa Fembra to receive this prayer. If you didn't and she's already dead, you can purchase this from the merchant in the upper left corner of Streets of Wakes.

Thank you for reading this guide. Should you find any mistakes or ideas to improve it, do not hesitate to contact me.