| Bourtzi | |
|---|---|
Μπούρτζι | |
 | |
 | |
| Former names | Καστέλλι (Kastelli), Πασσάζ (Passaz) |
| Etymology | Μπούρτζι < برج - burc meaning tower |
| General information | |
| Type | Castle |
| Architectural style | Renaissance architecture |
| Town or city | Nafplio |
| Country |  Greece |
| Coordinates | 37°34′11″N 22°47′25″E / 37.56972°N 22.79028°E |
| Elevation | 0 |
| Groundbreaking | 1473 |
| Design and construction | |
| Architect(s) | Antonio Gambello |
The water castle of Bourtzi (Greek: Μπούρτζι, from Ottoman Turkish برج - burc meaning "tower"; formerly Καστέλι, Kasteli) is a Venetian[1] castle located in the middle of the harbour of Nafplio.