Tower
Enter the tower and head up the stairs. Go to another tower over the stone bridge and take the elevator. Use the ladder to reach the top where you must find the soul of the Keeper of the Fire under the bell. Take it and return it to the Guardian later.
Remember: You can buy the tower key from the handmaid in the Fire Temple for 20 souls.
Use the elevator and head downstairs. Once on the bridge, you can find a ledge that you can use to jump down safely. Take a moment and jump between floors. There is a ring of Estus at the bottom.
Remember: If you visit this location after meeting the Unbreakable Patches in the Cathedral of the Deep, he will block the door and you must head downstairs.
It is much more difficult to reach the small coffin on the other side. You might need a few tries, but it's worth it.
Take a look at the screenshot and assume a similar position. Go to the edge, but don't jump. You have to run down the bridge and fall between the second and third tiles. You must fall from the side of the glowing ball. Collect the Fire Keeper Set (Robe, Gloves, and Skirt). Finally, you can jump down and collect the ring. Open the gate to return to the chapel, where an insane enemy will be waiting for you (if you didn't take him earlier).
Go to the tower and go upstairs. Go to the stone bridge and when you are halfway, notice the place where there are not a few stones. You can jump down to get to the roof, but you will take minor damage. Go up the stairs on the left side.
Then jump down on the other side, where you can come across a glowing lizard. Run to her before she disappears and collect Shimmering Titanite.
Return to the roof and at the very top you should find a nest. You can trade and leave certain items in order to get others. Stand in the nest and select the item you want to sell. If the merchant is interested, he will offer another one. For example, select the Homeward bone and get Iron Bracelets and Call Over, and black incendiary bombs can be exchanged for a chunk of titanite.
Jump down to reach the bottom of the roof. There is a Homeward bone next to the corpse. Take a walk on the roof and you will find a passage that leads inside. Take your time as you can easily fall into the chamber with the Cleansing Chapel bonfire. There is a shard of Estus on the corpse that dangles through the barrier.
Examine the wall behind the feathers scattered around (screenshot). This wall is in front of the entrance. In fact, it is an illusion that will disappear as soon as you enter it. Do this and go to the end, where you have to jump down. On the right you will find the Covetous Silver Serpent ring. This was the last item you can find in the Cleansing Chapel.
