I wasn't sure what "object" could be taken to mean, but I used it as a primary place in my novel - the place where the 26 hostages get abducted. So the entryways and exits are pretty important, as well as the layout and surroundings. Hope that's OK! I don't really have any important imaginary physical things like the sword of Gryffindor. All the physical objects in my novel are pretty real-to-life.