Today i'm going to show you 3 english websites related to law:

1º http://www.loc.gov/law/public/law.html
This website is very helpful, because you can download or read online all the laws of United States of America, but that's not the only thing, you can also search laws of other countries too.
Finally you can also search information about the services of the library and also about the supreme court.

2ºhttp://europa.eu/institutions/index_en.htm
This website is great! Because you can learn and search about all the institucions and bodies of the European Union. You can know how the institucions works, their statutes and many more. I think that if you do an investigation about the EU this website is very good source of information.

3ºhttp://ec.europa.eu/youreurope/nav/en/citizens/index.html
This website is about the rights and what means to be an European citizen. I think that this website is helpful to compare the citizenships between other countries or unions.
Is good if you have to do a comparation table between your citizenship rights and the EU citizenship rights.