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In page Walpurgis Night:

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The volbriöö celebrations are especially vigorous in Tartu, the university town in southern Estonia. For Estonian students in student corporations (Estonian fraternities and sororities), the night starts with a traditional procession through the streets of Tartu (during which the governing of the city is symbolically handed over to the students for the night by the mayor of Tartu), followed by visiting each other's corporation houses throughout the night.[citation needed]