The time of Pope Joan (papissa Joanna) is placed somewhat earlier than Theodora or Marozia; and the two years of her imaginary reign are forcibly inserted between Leo IV. and Benedict III. But the contemporary Anastasius indissolubly links the death of Leo and the elevation of Benedict, (illico, mox, p. 247;) and the accurate chronology of Pagi, Muratori, and Leibnitz, fixes both events to the year 857.