A Latin copyright notice
I was just cataloguing a 1949 edition of the Summa Theologica and noticing the imprimatur page. At the bottom of the page, I came across the following text:
Ius proprietatis vindicabitur (24-x-49)
I think that's the first copyright notice I've ever seen in Latin. Most Latin-language books I have either have no copyright notice or else a copyright notice in English. The stated copyright date is October 24, 1949 (following Italian, not ancient Roman, usage).