| Castelo de Montemor-o-Velho | |
|---|---|
| Montemor-o-Velho, Portugal | |
 | |
| Type | Medieval fortress |
| Site information | |
| Owner | Portuguese Republic |
| Condition | Intact |
| Site history | |
| Built | 1088–1520 |
| Built by | Alfonso VI of León and Castile |
The Castle of Montemor-o-Velho (Portuguese: Castelo de Montemor-o-Velho) is a Portuguese castle in the civil parish of Montemor-o-Velho e Gatões, municipality of Montemor-o-Velho, district of Coimbra.
It has been listed as a national monument since 1910. It is older than Portugal's nationality (1139).
Since 2014, the castle hosts the Festival Forte which is an electronic music festival set in August.