Hello, I am doing my bachelor programme in International Relations (faculty of political sciences) in Rome. Now I would like to attend a Master program in Law, maybe in European and International Law. Do you know what universities in Europe allow you to attend a Master program in Law having gotten a non-law bachelor? I studied quite many subjects related to Law. Thanks in advance!

I've heard that most Dutch LLM in International Law admit students from different background suchs as international relations, political science, economics...

There are lots, but the Dutch programs aren't really the ones to look at - these mostly do require a law degree. If a law degree isn't required, they will often refer you to another LLM program designed specifically for non-lawyers. The problem is that the curriculum is arguably less intensive as a result, which might make some students reticent to try it and might have some career consequences.

Almost all the programs in England don't require an LLB. ADH Geneva also doesn't (though you are more likely to get in if you have one), the Graduate Institute doesn't require one, and, since you are in Italy, you might want to consider UNICRI which also accepts applicants from a wide range of subjects.