The Basque witch trials of the 17th century represent the most ambitious attempt at rooting out witchcraft ever undertaken by the Spanish Inquisition.

The trial of the Basque witches at Logroño, near Navarre, in northern Spain, which begins in January 1609, against the background of similar persecutions conducted in Labourd by Pierre de Lancre, is almost certainly the biggest single event of its kind in history.

By the end some 7,000 cases had been examined by the Inquisition.