Estremoz (ĕshtrəmôshˈ) [key], town (1991 pop. 16,910), Évora dist., S central Portugal, in Alto Alentejo. It is famous for its white, almost translucent marble and also for its pottery. The castle, with its stately tower built in the 13th cent., is much admired. Some of the expeditions of Nun'Álvares Pereira were based at Estremoz, and in the 17th cent. it was important in the wars with Spain.