In AD 670 Pope Vitalian introduced the first organ in church history at the cathedral in Rome, but organs were not widely played in churches until the eighteenth century. In fact often they were met with great suspicion and even anger. The organ gradually made its way into general usage in the Catholic Church by the thirteenth century but some of the Reformers, particularly John Calvin (1509-1564), considered it an instrument of the world and the devil. John Knox in Scotland was the leader of the Reformation, and being influenced by Calvin, he set about removing the offending instrument. By 1727 only one organ could be found in all of the churches in Scotland. Today, of course, in many Protestant and Catholic denominations the organ is regarded as being an old-fashioned instrument.