Room History Visibility ======================= Whether a member of a room can see the events that happened in a room from before they joined the room is controlled by the ``history_visibility`` key of the ``m.room.history_visibility`` state event. The valid values for ``history_visibility`` are: - ``shared`` - ``invited`` - ``joined`` By default if no ``history_visibility`` is set it is assumed to be ``shared``. The rules governing whether a user is allowed to see an event depend solely on the state of the room at that event: 1. If the user was joined, allow. 2. If the user was invited and the ``history_visibility`` was set to ``invited`` or ``shared``, allow. 3. If the user was neither invited nor joined but the ``history_visibility`` was set to ``shared``, allow. 4. Otherwise, deny.