Theodora

Rome mint?

The larger amount of mint marks for this type appear to be from Trier. This is a guess on my part, but I think you were able to tell this coin is from one of the two other mints. I'm going to agree with ancientcoinguy and say Constantinople.

Interesting question, dont give us the answer just yet as I'm not quite finished trying to work it out, I know little about her or her coins

My perhaps incorrect ramblings so far.

I think it could only have been minted in the following places, Trier (under Constantine II), Rome (under Constans) or Constantinopolis (under Constantius II).

I have a nagging doubt I may be missing something with Dalmatius but pretty sure he was 'out of the picture' before this was struck.

Style wise I would discount Trier and Constantine II but I cant seem to decide between the other two mints. If pushed I would probably say Constantinopolis.

The most interesting thing is why any of them would mint a coin to their non-paternal grandmother .

The three brothers were in a power struggle themselves at around this time and Theodora was either Maximiam's daughter or step-daughter, not sure how this impacts on the answer but suspect it does.

Well, Hannibalianus, like Licinius II (Constantia) was dead before the purges after Constantines death and had no heirs.

Anastasia was promised to Bassianus but it didn't happen so I cant see her being involved.

Eutropia is the link to Virius Nepotianus and Nepotianus whom I suppose could have produced this coin when he usurped against Magnentius but unlikely.

Leaving us, I think, with only Julius Constantius or his son Constantius Gallus or Flavius Dalmatius or his son Dalmatius. All other descendants seem to inconsequential unless I'm missing something like a marriage. Both of these fathers were killed shortly after Constantines death in 337.

Constantius Gallus is certainly a possibility but I cant find any references to any of these offspring issuing coins in her name, unfortunately I have neither the time or the desire right now to fight RICs index systems but would suggest 8 as a good starting point.

I had stayed away from these issuers and stuck to Constantines sons as I was far from sure any of them actually issued coins in here name, but, being the reason for an issue and issuing it yourself are two different things with the same outcome. I thought I had missed something with Dalmatius / Delmatius and getting no further forward after the above will stick with him. Its possible he championed the coin or had this one produced shortly before he was murdered and his part of the Empire absorbed by Constans and Constantius II.

Waiting for the answer. Are you ready to reveal it yet?

I see it as Trier style. Rome is impossible due to the obverse legend breaking in a different place than they used. Constantinople is eliminated to me just as a question of style but I could be wrong.

Consider that the RIC listings also include coins for Helena as part of this series. Both women were dead but neither has Diva legend to match Constantine's posthumous coins also part of the same series. Perhaps they were honored people by many factions and safe to honor without being controversial?