Denier - Louis I Vienne 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 | 1.75 g |
| Dimensions | |
| Thickness | |
| Shape and Technique | Round (irregular) Hammered |
| Orientation | Variable alignment ↺ |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | Morrison#433-434, Prou Car#842-843, Nouchy#78 (p.106), Gariel Car#XX/146-147 |