Rome unknown [opgelost]

Hello. I need some help identifications and value. Thanks.

A lot of 'anonimous ruler'-coins have 'VRBS ROMA' (city of Rome)
The mintplace is ISIS

If you do a word search ("she-wolf" or "VRBS ROMA") you might find the coin:
http://www.wildwinds.com/freefind.html

This nummus is part of the VRBS ROMA and CONSTANTINOPOLIS series, struck under Constantine I to commemorate the founding of Constantinople and remind everyone the power of Rome.

Obverse: VRBS ROMA (literally "City of Rome") - Bust of Roma, left, helmeted, wearing imperial mantle.
Reverse: She-wolf left suckling Romulus and Remus, two stars above. In exergue, seems to be •ΓSIS•.

• Romulus and Remus are the twin brothers who led to the founding of the city of Rome.
  
• The two stars represent the Dioscuri (Castor and Pollux), sons of Zeus.
  
• SIS is for Siscia mint and Γ for its 3rd officina.
  

Your coin was struck by 3rd officina of Siscia mint around 334-335, reference is RIC#240 (Volume 7); see the file here on Numista and see here for similar coins.

You can find a wrap-up about this here with various examples of these coins.

Thanks Pejounet!
I am not very good in roman coins, so thanks to you I have learned!

Citeer: "pejounet"​This nummus is part of the VRBS ROMA and CONSTANTINOPOLIS series, struck under Constantine I to commemorate the founding of Constantinople and remind everyone the power of Rome.
​
​Obverse: VRBS ROMA (literally "City of Rome") - Bust of Roma, left, helmeted, wearing imperial mantle.
​Reverse: She-wolf left suckling Romulus and Remus, two stars above. In exergue, seems to be •ΓSIS•.
​

• Romulus and Remus are the twin brothers who led to the founding of the city of Rome.
  ​
  
• The two stars represent the Dioscuri (Castor and Pollux), sons of Zeus.
  ​
  
• SIS is for Siscia mint and Γ for its 3rd officina.
  ​
  

​
​Your coin was struck by 3rd officina of Siscia mint around 334-335, reference is RIC#240 (Volume 7); see the file here on Numista and see here for similar coins.
​
​You can find a wrap-up about this here with various examples of these coins.

​I agree, except it's a Follis not a Nummus, and it's RIC VII 240,Γ
http://www.wildwinds.com/coins/ric/city_commemoratives/t.html

The famous "battle" between Follis and Nummus , long live the battle

Both Follis and Nummus can be found on websites for this coin along with Centenionalis. A "more technical" name would be AE3 because it's made of bronze (AE for aes) and the size of this coin should be 17mm to 21mm (3).
I'll stick to Nummus or rather go for AE3, but not for Follis as I would keep it for the 40 nummi Byzantine coins.

The "story" behind my thoughts:

• Follis and Nummus are nowadays used interchangeably, referring to bronze coins (around 12-14 grams for 30mm) introduced following Diocletian's reform around 294-295 which contained small amount of silver (around 4-5%, mostly through plating). These coins progressively lost in size and weight (down to around 3 grams for 17mm), and did not contain any silver under the Constantinian era.
  
• The term Follis used as a denomination is a modern use appearing around 19th-20th century, but technically no value is associated to this term (as monetary value) for the Roman period. This term derives from Folles which is a leather purse containing 125 silver coins for a value of 12,500 denarii communes (understand denarii as an accounting unit here and not the silver coin denomination). Under Diocletian, these silver coins were Argenteus while ancient texts talk about Leptons for the Greek equivalent.
  
• Nummus, literally translating to "coin" or "money", appears as is in some ancient text and as a denomination for a roman coin, which exact monetary value is also still being debated today.
  
• The Nummus term is also used in continuity under Byzantine era as a monetary unit giving coins such as pentanummium (5 nummi), decanummium (10 nummi), dodecanummium (12 nummi). At this time, the Follis term was effectively in use for a specific monetary value of 40 nummi (coins marked with an M on reverse). This seems to fit with the above: Follis is more a term used to express the value of multiples of the monetary unit rather than a coin itself.
  

"A "more technical" name would be AE3 because it's made of bronze (AE for aes) and the size of this coin should be 17mm to 21mm (3)."

I would call it an AE3 Follis, but never a Nummus; that term would not be consistent with RIC.

Thank's all answer.