It's complicated!

Once built, Items and Treasures are available to everyone. Many such cards can only be used by one character per round; if this is the case, it is specified in the rules in this app, and sometimes on the cards themselves. A few cards (Sack, Basket) must be assigned to Actions during the planning step of the Action Phase. Finally, some cards have no ownership, and can be used by multiple characters without limit (Bed, Hammock).