Indeed. It was an easy one. The Heidentor ("the gate of the pagans") as they called it in the Middle Ages, is probably an honorific arch for Constantius II.
Over to you, dear Christian, over to Augsburg.
Jona Lendering Relevance is the enemy of history My website
Visne partem mei capere? Comminus agamus! * Me semper rogo, Quid faceret Iulius Caesar? * Confidence is a good thing! Overconfidence is too much of a good thing.
[b]Legio XIIII GMV. (Q. Magivs)RMRS Remember Atuatuca! Vengence will be ours!
Titus Flavius Germanus
Batavian Coh I
Byron Angel
EDIT - if the location's right, it could be inscription AE 1967, 00495: Dd(ominis) nn(ostris) Gal(erio) Val(erio) Maximiano et Gal(erio) Val(erio) Maximino et Fl(avio) Val(erio) Const]antino et Val(erio) Licinniano Licinnio / Invictis Auggustis Val(erius) Diogenes v(ir) p(erfectissimus) praes(es) provinc(iae) devotus numini maiestatique eorum
Which is more or less, I think: Our Lords Galerius Valerius Maximianus [ie Galerius] and Galerius Valerius Maximinus [ie Maximinus Daia] and Flavius Valerius Constantinus [Constantine]and Valerius Licinianus Licinius [Licinius] the Unconquered Emperors, Valerius Diogenes the perfect man, president of the province, devoted to their spirit and majesty [set this up]...