| Qalet Marku Battery | |
|---|---|
Batterija ta' Qalet Marku | |
| Baħar iċ-Ċagħaq, Naxxar, Malta | |
 Remains of Qalet Marku Battery | |
| Coordinates | 35°56′42.2″N 14°27′14.1″E / 35.945056°N 14.453917°E |
| Type | Artillery battery |
| Site information | |
| Owner | Government of Malta |
| Condition | Ruins |
| Site history | |
| Built | 1715–1716 |
| Built by | Order of Saint John |
| Materials | Limestone |
Qalet Marku Battery (Maltese: Batterija ta' Qalet Marku), also known as D'Orbeau Battery (Maltese: Batterija D'Orbeau), was an artillery battery in Baħar iċ-Ċagħaq, within the limits of Naxxar, Malta. It was built in 1715–1716 by the Order of Saint John as one of a series of coastal fortifications around the Maltese Islands. The battery has been largely destroyed, but some remains can still be seen.