Gregorian Reform
Consistories became an opportunity for the pope to decide matters of state and dispense justice directly, with the support and advice of Roman bishops and those bishops from other regions who happened to be in Rome. Pope Leo IV ordered that consistories be held twice weekly. Pope John VIII relaxed that edict slightly and an order of twice-monthly consistories. With the Gregorian Reform, the Church limited outside influences on the papacy and the selection of popes and the power of cardinals increased. Tradition developed that the pope would use consistories (closer to twice-yearly by the 17th century) to reveal a list of those that were to be elevated to the rank of cardinal.