Another less rigid definition states that a virtual museum can be a digital collection that is presented either over the Web, or to an intranet, either via a personal computer (PC), an informative kiosk, a personal digital assistant (PDA), or even to a CD-ROM as an extension of a physical museum, or that it can be completely imaginary. Furthermore, the abstract term virtual museum can take various forms depending on the application scenario and end-user. It can be a 3D reconstruction of the physical museum. Alternatively, it can be a completely imaginary environment, in the form of various rooms, in which the cultural artifacts are placed