Sacristy
The room is called a Sacristy.
This room is called the Vestry or Sacristry.vestry: a room in a church where sacred vessels and vestments are kept or meetings are held.or it is called a sanctuary.
The room is called a sanctuary, the seats are called pews
It's typically called an armory.That is the Arms Room or Armory.
Chapel, church, temple.
pantry or kitchen
That would be Church, and the room we all worship in is called the Sanctuary.
A pantry
GRANGE
The room is called the Confessional.
Could be anything. You could be thinking of an armoury, arms room... most people I know simply store guns in a closet in their home, though.
In the New Testament, 'ekklesia' is the Greek term used for those 'called out' as the new Church. Many met in houses at this time. There are some in Christianity that would point to the 'Upper Room' as the first Church or meeting place of the new following. In the Catholic denomination, this room is called the 'Cenacle' and considered by them to be the first Church in Christendom.