| Castle of Mértola | |
|---|---|
Castelo de Mértola | |
| Beja, Baixo Alentejo, Alentejo in Portugal | |
 A view of the castle as situated on the hilltop, with the mosque/Christian church | |
| Coordinates | 37°38′20.4″N 7°39′49.5″W / 37.639000°N 7.663750°W |
| Type | Castle |
| Site information | |
| Owner | Portuguese Republic |
| Operator | Câmara Municipal de Mértola, ceded on 18 January 1941 (adjacent terrains) |
| Open to the public | Public |
| Site history | |
| Built | 318 B.C. |
| Materials | Stone masonryAlvenaria, Tile, Cornerstone, Taipa |
The Castle of Mértola (Portuguese: Castelo de Mértola) is a well-preserved medieval castle located in the civil parish and municipality of Mértola, in the Portuguese district of Beja.