hologramdoorbells:do-nothing:ドアの向う側が見えるドアノブ Japanese architect Hideyuki Nakayama teamed up with door
hologramdoorbells:do-nothing:ドアの向う側が見えるドアノブ Japanese architect Hideyuki Nakayama teamed up with door knob manufacturer UNION to create this Glass Door Knob that provides a Fisheye View of the Other Side -- source link