after you have talking with Abbe (or something similar) go to the Mayor's House in Holy... talk with the man near the stairs...
After try to go out and the man stop you and tells you that is a brick that can moving... go to the place he shows you and take the key...
From this, you can go to the church and open the cellar... ;)
Server: Virgo (from 1 to 3)
IGN: Serramax
Surname: Gladiatore
Guild: No guild
Alt: Serramax2, SerraRyo
Gmt: +1 (Italy)