| Kastorbrunnen | |
|---|---|
| en: Saint Castor's Fountain | |
 The Kastorbrunnen showing the inscriptions | |
 | |
| Artist | Jean Marie Thérèse Doazan |
| Year | 1812 |
| Medium | Niedermendig basalt |
| Location | Basilica of St. Kastor, Koblenz, Rhineland-Palatinate, Germany |
| 50°21′45″N 7°36′12″E / 50.36252°N 7.60344°E | |
The Kastorbrunnen (Saint Castor's Fountain) in the forecourt of the Basilica of St. Kastor in Koblenz, Rhineland-Palatinate, Germany, is a curious testimony of the Napoleonic Wars. The fountain, built in 1812, was connected to the first aqueduct of the Elector Palatine.