Denier - Louis I Mainz mint
€1.00
| Issuer | Unified Carolingian Empire |
| Year | 818-823 |
| Type | Standard circulation coin |
| Value | 1 Denier (1⁄240) |
| Currency | Pound (751-843) |
| Composition | Silver |
| Weight | 1.60 g |
| Dimensions | |
| Thickness | |
| Shape and Technique | Round (irregular) Hammered |
| Orientation | Variable alignment ↺ |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | Morrison#321 var., Prou Car#34 var., Gariel Car#XVII/77 var. |