Abstract: A hinge for mounting a closure in an opening in a structure for swinging movement about an external hinge line or axis without the use of external hinge devices. The hinge device comprises first and second attachment members mounted on a member of the structure at one boundary of the opening and on the closure, respectively. The first attachment member is mounted internally of the opening and the second attachment member is mounted on the inner side of the closure. A first hinge member is pivotally coupled to the first attachment member for swinging movement about a first axis and a second hinge member is pivotally coupled to the second attachment member for swinging movement about a second axis. The first and second hinge members at their distal ends are pivotally coupled to each other for swinging movement about the third axis intermediate the first and second axes.