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Oberhausen, Germany; Odense, Denmark; Odivelas, Portugal; Olbia, Italy; Olsztyn, Poland; Olten, Switzerland; Ordu, Turkey; Orestiada, Greece; Orleans, France; Oslo, Norway; Osnabruck, Germany; Ostrava, Czech Republic; Ostend, Belgium; Oulu, Finland and Oviedo, Spain are cities in Europe. They begin with the letter O.

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10y ago

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