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The World Factbook. (2023). [Lisbon, Portugal's capital and largest city, is often called the “White City" due to the ochre stone used in its buildings that seems to illuminate the city when the sun’s rays reflect off it. At the center of this picture is the Church of Santa Engracia, a 17th-century monument. Originally a church, it was converted in the 20th century into a National Pantheon in which important Portuguese personalities are buried.]. Central Intelligence Agency. https://www.cia.gov/the-world-factbook/countries/portugal/images