I don't know why you're being downvoted since it is something that is done by some individuals. Just marrying somebody is usually not sufficient though, and th

I don't know why you're being downvoted since it is something that is done by some individuals. Just marrying somebody is usually not sufficient though, and there are other requirements (put in place exactly to avoid this practice). For example you may be required to * Being married for a number of years * Residing with your spouse in the target country for number of years After meeting all the requirements you need to request the citizenship to the relevant authority, and the whole process may take quite some time. An example: if you marry an Italian citizen you may request citizenship after 2 years of marriage (3 if you're not living in Italy), but then it will take usually 3 more years for your request to be processed. Also keep in mind that some nations don't allow double citizenship, or require special circumstances (I think to remember it is the case for Germany and Holland) so you may have to choose between the two.