Constantine    22mm VF follis of Treveri (310-313)     Sear 3863    RIC 880
IMP CONSTANTINVS AVG - Laureate and draped bust right
MARTI CONSERVATORI - Helmeted and cuirassed bust of Mars right
Dedicated to "Mars the Preserver".  'Nuff said.  'cept maybe, "very cool coin".

Constantine      22mm aVF follis of Ostia (312-313 AD)     Sear 3869     RIC 94     
IMP C CONSTANTINVS P F AVG - Laureate and cuirassed bust right
S P Q R OPTIMO PRINCIPI - Legionary eagle between two standards
Minted in the first series of coins after Maxentius' defeat.  The reverse mimics the coins of Trajan, and as far as I know is the last use of the grand old abbreviation on a Roman coin.  Ave etqua vale, SPQR.  ex.Melqart

Constantine      22mm EF/VF follis of Cyzicus (312-313)     RIC 101b      
IMP C FL VAL CONSTANTINVS P F AVG - Laureate head right
GENIO AVGVSTI - Genius standing left holding patera in right hand over altar, cornucopia in left hand
Coin of the same period but from an eastern Mint under the control of Maximinus Daia.  Unimaginative tetriarchal portrait on the obverse, typical tribute to the spirit of the Augusti on the reverse. ex.Ron Bude

Constantine     20mm VF reduced follis of Rome (313 AD)     V.M. 52     RIC 10
IMP CONSTANTINVS P F AVG - Laureate, draped and cuirassed bust right
MARTI CONSERVATORI - Mars standing r. holding spear and shield
Struck the year after Constantine defeated Maxentius at Milvian Bridge, the coin shows that while Constantine may have begun converting to Christianity himself, he still needed to appease the populace with pagan themes on his currency.  ex.Ancient Auction House

Constantine      20mm EF/VF follis of Tinicium (313-314 AD)     Sear 3868      RIC 7
IMP CONSTANTINVS P F AVG - Laureate, draped, and cuirassed bust right
SOLI INVICTO COMITI - Sol standing l. holding globe
Again, so soon after Milvian Bridge the coinage is purely pagan.  The reverse here declares Constantine to be the "Friend of Sol the Invincible".  The cult of Sol was a step toward monotheism however, part of the Neo-Platonism movement which both influenced and was influenced by Christianity.  ex.Melqart

Constantine     18mm VF ae3 of Cyzicus (317-320 AD)     Sear 3876    RIC 8
IMP CONSTANTINVS AVG - Laur. & draped bust left, holding mappa in r. hand
IOVI CONSERVATORI AVGG - Jupiter standing l. holding scepter and Victory on globe
A continuation of the theme so common on follii of the Tetriarchy, the reverse invokes Jupiter to protect the Augustii.

Constantine     18mm aVF ae3 of Thessalonica (318-319 AD)    RIC 31
CONSTANTINVS AVG - Laureate and cuirassed bust right
VOTXX - MVLT - XXX within wreath
I really don't understand this coin at all. Minted at least a year before Constantine's fifteenth anniversary celebrations, it seems to give thanks for twenty completed years and pledging ten more.  Can anyone enlighten me?

Constantine     17mm VF ae3 of Treveri (319 AD)     Sear 3883    RIC 213
IMP CONSTANTINVS MAX AVG - Helemeted and cuirassed bust right
VICTORIAE LAETAE PRINC PERP VOT P R - Two Victories holding shield inscribed VOT P R above altar
The reverse is dedicated to "The Joyful Victories of our Princes".  The "VOT P R" on the shield stands for the "Vows of the People of Rome" - annual vows of loyalty to the Emperor.

Constantine     18mm VF ae3 of Siscia (320 AD)     Sear 3885     V.M. 92     RIC 120
CONSTANTINVS AVG - Helmeted and cuirassed bust right
VIRTVS EXERCIT VOT XX - Two captives seated below a standard inscribed "VOTXX"
Minted to celebrate the fifteenth year of Constantine's reign.  Which is odd, because the earliest he could be said to have reigned was in 306, when he was proclaimed Augustus by his father's troops upon the old man's death.  Even that title he had to resign soon after.  Of course, by 320 no one was likely to bring the up point to Constantine, master of life and death in the Western Empire.  I sure wouldn't have.  Anyway, the important part of this coin is the labarum-like standard on the reverse.  Since the labarum was a symbol of Constantine's conversion to Christianity, these may be among the first coins with a Christian symbol.

Constantine      18mm EF/VF ae3 of Rome (321 AD)     Sear 3873    RIC 237
CONSTANTINVS AVG - Laureate head right
D N CONSTANTINI MAX AVG VOT XX - VOT XX within wreath, rest outside wreath
Struck during Constantine's fifteenth anniversary celebrations, the "VOT XX" advertising the vows offered for another five years rule. ex.Tony Laverack

Constantine    19mm gVF/VF ae3 of Sirmium (324-325 AD)      Sear 3880     V.M. 87     RIC 48
CONSTANTINVS AVG - Diademed head right
SARMATIA DEVICTA - Victory walking r., a captive at her feet
Commemorates Constantine's thumping of the Sarmatians (southern Poles).  While Victory is a pagan deity, its use as a personification is less overtly pagan than direct references to such pagan gods as Jove.  Statues of Victory existed in Constantinople well into the Byzantine period. 

Constantine     18mm Fine ae3 of Rome (326 AD)    Sear-3872    RIC 281
(ANEPIGRAPHIC) - Laureate, draped, and cuirassed bust right
CONSTANTINVS AVG - CONSTAN / TINVS / AVG
The empire was celebrating a series of dynastic anniversaries.   325-326 saw Constantine's 20th, the promotion of Constantius to Caesar, and the 10th anniversary of Crispus and Constantine II to that rank.  Crispus didn't have much time left to enjoy the rank.  By the middle of 326 he had been executed by his father.

Constantine     22mm VF ae3 of Cyzicus (326-327 AD)    Sear 3878    RIC 44
CONSTANTINVS AVG - Diademed head right
PROVIDENTIAE AVGG - Campgate with star between two turrets
This coin is a lot nicer in hand - the partial silvering makes the patina appear patchy when scanned.  The reverse of this series (Forethought of the Augustii) has always seemed odd to me.  "AVGG" implies two Ausgustii and Licinius was long dead.  According to RIC VII the campgate reverse was a reference back to the Campgate argentii of the Tetriarchs which had "AVGG" back when there really were two Augustii.  Seems unimaginative to me.

Constantine     19mm VF ae3 of Constantinople (327-328 AD)     Sear 3877     V.M. 83     RIC 18
CONSTANTINVS MAX AVG - Laureate head right
LIBERTAS PVBLICA - Libertas standing left on galley, wreath in both hands
Coin produced to commemorate Crispus' victory over Licinius' navy in 324 A.D.  As in the coin above, Libertas, while pagan, seems to be simply a personification of something desirable, just as we use the Statue of Liberty.  ex.Tom Wood

Constantine     18mm VF ae3 of Constantinople (327-328 AD)     RIC 23 
CONSTANTINVS MAX AVG - Diademed head right
GLORIA ROMANORVM - Roma seated l. holding scepter and Victory, shield to right
It seems a bit ironic to strike a coin commemorating the "Glory of Rome" in the new capital, Constantinople.  At this time Constantinople was three years old so it probably didn't have a lot of glory of its own.  It had plenty to come however, to be earned over the next 1,100 years.  ex.Silenos

Constantine    19mm VF ae3 of Constantinople (328-329 AD)     V.M. 83    RIC 32
CONSTANTINVS MAX AVG - Pearl and rosette diademed head right, eyes raised to heaven
CONSTANTINIANA DAFNE - Victory seated l., trophy and captive before her
Considered to be one of the first coins with a Christian theme, the reverse refers to the erection of a fortress at Daphne on the Danube front ca. 328 AD.  ex.Zachary Beasley

Constantine     23mm aEF ae3 of Rome (329 AD)     Sear 3874     RIC 322
CONSTANTINVS MAX AVG - Rosette diademed, cuirassed and draped bust right
D N CONSTANTINI MAX AVG VOT XXX - VOT XXX within wreath surrounded by inscription
Minted for Constantine's upcoming 25th anniversary.  These were big deals in the calendar - not just for the celebration of a popular, long-lived emperor, but also for the donatives which came with it.  With a standing army of 250,000 soldiers, each getting five solidii and one pound of silver, it runs to a stunning 5.5 tons of gold and 80 tons of silver.  

Constantine     14mm EF ae4 of Arelate (336 AD)     Sear 3887     V.M. 94     RIC 394
CONSTANTINVS MAX AVG - Diademed, draped and cuirassed bust right
GLORIA EXERCITVS - Two soldiers flanking a labarum
Minted the year before Constantine's death, the large and proud ChiRho on the labarum shows that Christianity's place in the Empire is now secure.   ex.Joe Sermarini