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This first fortification was made in 2nd century BC
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Between 200 AD and 1147 AD, Castelo de São Jorge was lived by many civilizations and empires, including Phoenicians, Greeks,Carthaginians, Roman, Suebic, Visigothic, and Moors.
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In 1147, Castelo de São Jorge was conquered by D. Afonso Henriques, the first king of Portugal.
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In 1255 AD, D. Afonso III lived in Castelo de São Jorge
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In 1300, D. Deniz renovated and fortified the castle
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Between 1373 and 1384, D. João I gave the castle to English Saint Patron São Jorge, for the marriage of English Princess Philippa of Lancaster.
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Around 16th century, Portugal was under Spanish Rule for 60 years, and the Spanish used the Castelo de São Jorge as a prison
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In 1755, the Earthquake in Lisbon heavily damaged the castle.