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Gustav Adolf Grammar School
Gustav Adolf Grammar School, established in 1631 by King Gustavus Adolphus of Sweden, is one of the oldest continuously operating secondary schools in Europe. Located on the historic site of St. Michael's Cistercian Nuns' Convent in Tallinn Old Town, the school is famous for spectral encounters involving phantom nuns, ethereal church bells, and a undiscovered monastic cemetery unearthed in the schoolyard.