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Harmony, borough (town), Butler county, western Pennsylvania, U.S., on Connoquenessing Creek, 25 miles (40 km) north of Pittsburgh. It is known as the first settlement in America of the Harmonist Society (Rappites) led by George Rapp, an immigrant from Württemberg, Germany, who held religious-communistic views and espoused celibacy. The town was laid out in 1805 as a “Community of Equality” and named Harmony for one of the society’s principles. The graveyard (just southeast of the...