Church Shrine II is built in the Church for 4 Oiled Plank, 6 Bronze Detail and 3 Polished Stone. +4 church quality. Unlocked by Church Furniture II. Its construction site needs Building mastery 3: below that, hits do nothing.
It adds 4 to church quality. More elaborate sermons need a higher church quality. Each new best church quality counts towards the Sacred Interior inspiration. Church Furniture II also unlocks Confession Booth II.