The popular belief itself is certainly encyclopaedialike content regardless of its truth For example we are quite sure now that Hera or Zeus are only myths but they have their place in an encyclopaedia I think speaking about national catastophes we need only those that were really fatal blows not everything that went wrong in the course of our history I think the traditional list is quite obvious      Luckily no presentday event has a similar magnitude from some wider perspective they are only a strong storm small riots etc What the article really needs I think are literary sources mentioning the curse I vaguely remember for example a Vrsmarty poem from the s but Im not sure