sentences:  Upon her request, Byzantine Emperor Justin II sent the abbey a relic of the True Cross.When Bishop of Poitiers Maroveus refused to preside over its installation in the abbey, at Radegund's request, king Sigebert sent Eufronius to Poitiers to perform the ceremony.Sigebert also returned church lands that had been seized by King Charibert
  
  In 561 much of Tours burned down during the warfare that raged at that time.