Obviously, the best place to put a gun safe is hidden from kids and burglars, not close to kitchen or fireplace, and the one without much moisture or high level of humidity. Depending on your needs, you can put your gun safe either in your bedroom or closet, a study or home office; or in the basement. If you need your pistol and valuables to be quickly accessible, especially at night, then install it in your bedroom or bolt it in your closet. It will be convenient for you to store your guns and papers in a vault placed in a home office, as you can take them any time when you work there, and provide double security for them by closing the room when you leave. However, if you need a gun safe to keep heavy firearms and armour which you rarely use, then your basement will be a good choice.