The Great Hall is a ball room in the Covenant Manor. The hall is a two-story room dominated by a large fireplace. It is here that Patrick meets Jeremiah and after, he fights with Ambrose, the Black Sheep of the Covenant family.
As longer as The Great Hall shelters ammo, there's near the windows two packets of normal bullets. There Patrick can use the ammo whilst fighting with Ambrose, while he is disturbed by the Hound Of Gel'ziabar.