A rare example of a 12th C (catalogue calls it, I think a bit earlier) punctus interrogativus, or question mark. The clause starts 2 lines from the bottom, on the right "Petre amas me?"
#Vatican Barb.lat.541 f.2v
#Medievodons #Medieval
@aaronm What of the sentence immediately prior to that one, that ends in what might be dicit? The mark is more above the t than after it, but it otherwise looks very similar.
@aeronaute the two together read "Sic certe a D[omi]no ad beatu[m] Petru[m] dicit[ur]: Petre, amas me?" the squiggle over the "t" in "dicit" is an "-ur" abbreviation