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Castagnola 
Summary
Castagnola may refer to:
- Castagnola-Cassarate, quarter of the city of Lugano, in the Swiss canton of Ticino
- Castagnola, Switzerland, village on the northern shore of Lake Lugano, Switzerland
- Castagnola (surname), Italian surname
- Castagnola's, historical restaurant in San Francisco, California, United States of America