"Cum Josephus nostro in Atheneo inter studentes ordinarios sollemni officio per tempus adscriptus, omnia studia perfecerit…………"
I have a diploma from a Catholic Atheneum in Rome. I don't get the idea of "sollemni officio" - could it be: "As Joseph has been inscribed in out Atheneum in solemn office for the prescribed time has finished... studies.... etc.? thank you