Fort of Feira
Malveira e São Miguel de Alcainça, Portugal · built 1809
The Fort of Feira, also known as the Fort of Malveira, is located at an altitude of 226 metres, above the town of Malveira, in the municipality of Mafra, in Lisbon District, Portugal. It was built in 1809-10 as part of the Lines of Torres Vedras, three lines of forts and redoubts designed to protect Lisbon against French troops. The fort was reopened to the public in 2011.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).