Julius Caesar Scaliger, or Giulio Cesare della Scala, was an Italian scholar and physician, who spent a major part of his career in France. He employed the techniques and discoveries of Renaissance humanism to defend Aristotelianism against the New Learning. In spite of his contentious disposition, his contemporary reputation was high. Jacques Auguste de Thou claimed that none of the ancients could be placed above him and that he had no equal in his own time.