The new naming is then "Université Sorbonne Université" or "Université Sorbonne-Université" though colloquially and in most communications, and in registered trademarks is simply "Sorbonne Université". The first "University" in the name refers to the fact that it is a University – only public higher education institutions are allowed to use that term in France– and the second "University" comes from the naming convention of adding a name after the City-number designation. Currently Sorbonne Université is the only Sorbonne university not using a number in its name.