From the LCMS website:
Moving from the Old World to the New, Muhlenberg established the shape of Lutheran parishes for America during a 45-year ministry in Pennsylvania. Born at Einbeck, Germany, in 1711, he came to the American colonies in 1742. A tireless traveler, Muhlenberg helped to found many Lutheran congregations and was the guiding force behind the first American Lutheran synod, the Ministerium of Pennsylvania, founded in 1748. He valued the role of music in Lutheran worship (often serving as his own organist) and was also the guiding force in preparing the first American Lutheran liturgy (also in 1748). Muhlenberg is remembered as a church leader, a journalist, a liturgist, and—above all—a pastor to the congregation in his charge. He died in 1787, leaving behind a large extended family and a lasting heritage: American Lutheranism.