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The library hall , designed by the architect Peter Thumb in a Rococo style , is considered the most beautiful non-sacred room of this style in Switzerland and one of the most perfect library rooms around the world .
 Peter Thumb, Switzerland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Peter Thumb, Switzerland