≡Oeiras in the Age of Discoveries
Oeiras, 15th century – During the Age of Discoveries, Oeiras established itself as an important breadbasket for Lisbon and an industrial center, with expanding commercial and manufacturing activities. Documents from 1448 confirm that Oeiras, Aljez, and Barcarena were elevated to the status of reguengo, lands belonging to the Crown, granting privileges to local farmers. During the same period, the first estates emerged, such as Quinta de Paço de Arcos, used by the nobility for hunting and leisure, while the construction of palaces and manor houses multiplied. In the 16th century, the region industrialized: quarries were exploited, and the Lime Kilns were built in Paço de Arcos, while in Barcarena the Black Powder Factory was established for weapons production. The area also strengthened militarily, with fortifications along the coastline, including Forte da Barra and Forte de São Lourenço do Bugio, protecting the entrance to the Tagus River. Between the 16th and 18th centuries, convents and churches, such as the Cartuxa, were built, while agricultural and wine-producing estates supplied the capital. Oeiras thus consolidated itself as a strategic and multifaceted hub, balancing tradition, defense, and economic development.
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