There is a Latin phrase "Tempora mutantur et nos mutamur in illis" according to the English version of Wikipedia: http://en.wikipedia.org/wiki/List_of_Latin_phrases_(T) There is stated that the phrase is attributed to Empereur Lothaire Ier d'Occident (840-855). I have in my homework to translate a variant of the above mentioned Latin phrase. In my homework it is "Tempora mutantur et nos mutamur cum illis". What is the original version? Who said the original version? Is the sentence in my homework authentic or a later alteration?