Montemor-o-Novo castle was built on the highest mountain in the region, based probably on the site of an old prehistoric fort, with later Roman and Moorish occupation.
It was conquered to the moors by D. Afonso Henriques and D. Sancho I conceded it the 1st charter in 1203.
The 1755 earthquake caused enough damage to the castle, which would require repairs. Having withstood the assaults during the French invasion, was phased out, speeding up the state of disrepair over the twentieth century.
The convent’s church is an interesting example of Classic Baroque architecture.