Um. I'm the last one here who should be trying to answer this (I do medievals, mostly, and have for decades), but it Feels maybe earlier-mid-3rd century, likely a provincial issue. Can't identify it with a Severan, suggesting the later part of that spectrum. Meanwhile, welcome to the forum!!! There are rafts of people here who can give you a much more solid idea, if not a full attribution.
its representing a provincial temple reverse..i haven't a clue to the bust or visible lettering..its a magic coin...whoever you want it to be, until further notice
Yeah I think Gallienus is a good start… I seem to see “AΛΛIH” from GALLIENVS in Greek (ΓAΛΛIHNOC) in the legend… I’d do some looking in this acsearch with the terms Gallienus and Temple and see if you can get a lead from something that looks similar: https://www.acsearch.info/search.ht...de=1&fr=1&it=1&es=1&ot=1¤cy=usd&order=0 Better photos of both sides would help with identification.
I agree with Pete (and OJ, who responded as I typed). You can make out the emperor's name. In hand you can probably make out some of the reverse legend. The photos are small and not well lit or focused, and because of the patchy patina it looks like camouflage. If you can't read the reverse legend in hand, try making a rubbing (thin paper, rub pencil lead over it). Sometimes that will make the devices and letters clear and can be helpful when the patina and condition conspire to obscure the identity .
I took a quick pass through ACsearch and other places and didn't see a tetrastyle reverse like this for Gallienus. Hmm. The overall flan style reminds me of a Gallienus I have from Neocaesarea (Pontus) that gave me fits for a long time. There are many provincials of Gallienus with temples but they are of a different style. There is a similar temple reverse for Gallienus issued in Neocaesarea but the temple is in perspective. Check it out though-- the tetrastyle end has the same triangular pediment style as the OP's coin. https://www.cngcoins.com/Coin.aspx?CoinID=281364 @Ed Snible-- is your interface for ISEGRIM down? I could access it or ISEGRIM. I guess if ISEGRIM is down your interface would be too...
The temple kinda reminded me of this coin (a recent cheap buy that I don’t yet have in-hand) from Nicaea, Bithynia of Caracalla. but I couldn’t find anything similar for Gallienus. *edit… but 6 vs 4 columns… so similar in style but probably not all that helpful.
The ISEGRIM people have a new forms-based interface at http://isegrim.dasr.de/isegrim_neu/test2014.php . (Mine version depended on their original query-based version, which has been removed.) ISEGRIM's new version doesn't support wildcards. A search for Description of "Gallienus" and "TEMPLE-FRONT OF 4" shows 43 possibilities.