Undead Parish - p. 3 | Walkthrough Dark Souls Guide
Last update: 11 May 2016
At the bottom you can "break down" corpse in a barrel to pick up Humanity.
At the end of the church you'll also find a hidden passage. It is enough to destroy boards.
Use the stairs up. At its top free a prisoner (Knight Lautrec of Carim).
Now you're ready to try to defeat gargoyles on a rooftop. An entrance to the arena is located in a right, back part of the church. You have to climb two ladders and pass through fog.
After the fight with gargoyles, run to the other side of the rooftop and enter the tower.
Go to the top using ladders.
Once you get there, activate a lever to ring a bell.
You'll get Homeward Bone - a bone which allows you to return to the last visited bonfire. Do not use it though. Instead go down the tower to meet a local merchant named Oswald. Take a look at his offer. You'll find there Purging Stone among other things. These stones remove curse and can be useful later.
After killing the gargoyle, you might spend your souls to increase your level. You can return to a closest bonfire (Firelink Shrine) or discover a new one (a way there is not too tough). Locate a last exit from the church (in front of elevators). Outside you'll have to kill three enemies (with one archer among them).
Run through a long passage between columns.
Go down the stairs [1] and light a bonfire. [2]
You can choose two ways from here. A side exit leads to Sen's Fortress - this location will be accessible only after ringing two bells.
A level down you'll find blacksmith Andre. You may buy several items at him (Weapon Smithbox, Armor Smithbox, Repairbox). He can also upgrade your weapons. A very important item is Crest of Artorias for 20 thousands of souls. It is expensive but also offers a large shortcut in Darkroot Garden.
Darkroot Garden can be reached from the Andre chamber, if you go down. But watch out because you'll meet Titanite Demon there. So you should visit Depths first and leave Darkroot for later!