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The word is a generalization from the name of the original " Palladium " , a wooden statue ( xoanon ) of Pallas Athena that Odysseus and Diomedes stole from the citadel of Troy and which was supposedly later taken to the future site of Rome by Aeneas , where it remained until perhaps transferred to Constantinople and lost sight of after the conversion of the Empire to Christianity .
 Troy, Rome, Constantinople
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Troy, Rome, Constantinople