In the 16th century political and religious changes altered the attitude of historians towards John. Tudor historians were generally favourably inclined towards the king, focusing on John's opposition to the Papacy and his promotion of the special rights and prerogatives of a king. Revisionist histories written by John Foxe, William Tyndale and Robert Barnes portrayed John as an early Protestant hero, and John Foxe included the king in his Book of Martyrs. John Speed's Historie of Great Britaine in 1632 praised John's "great renown" as a king; he blamed the bias of medieval chroniclers for the king's poor reputation.