In fact, it is at the moment when wearing them became exclusively feminine that they took it into their heads to systematically represent Saint-Just wearing an earring.
Do you think that this sentence is OK in terms of wording? I understand this in this way: In many representations of Saint Just he is portayed with earring in his ear. This fact is drummed into heads of the public ("they took it into their heads"). The picture of Saint Just's wearing earring "feminizes" him. I have problems with phrases "wearing them" and "wearing earring" when firstly is the pronoun used and just then the noun.