There are four Prophets in the lunettes while the central lunette is filled with clouds and two putti. The lunette frescos are connected to the central theme of the painted decoration because the four Old Testament figures prefigured or prophesied the mission and death of Jesus. The parallels could be easily grasped by an erudite spectator in the Baroque era but they were also explained by way of the accompanying inscriptions. In the first lunette Daniel is depicted who visioned that "the Anointed One will be put to death" (Daniel 9:26) which was traditionally interpreted as a reference to the death of Christ. His angel is holding up a tablet with Greek, Latin and Hebrew letters, a probable reference to the holy relic of the Titulus Crucis which was also brought to Rome by Saint Helena. In the second lunette King David is shown with his harp, sceptre and a putto holding a scroll with an inscription: "[R]egnavit a ligno De[us]" which means: "God has reigned from the wood", an allusion to the cross. The expression is derived from a now obsolete version of the Psalm 96 in the Psalterium Romanum and appeared in this form in the hymn Vexilla Regis by Venantius Fortunatus. The words were widely understood as a prophecy that predicted the crucifixion of Christ and his reign over the world. The third prophet is not Hosea, as sometimes mistakenly identified, but Isaiah. The words on his scroll clearly reveal his true identity: "Non est sp[eci]es ei ne[que decor]" which means "he had no form nor comeliness". This is a line from Isaiah 53, the fourth Servant song which has been interpreted as a prophecy about the suffering of Jesus since apostolic times. At last Prophet Jonah is shown leaning against the whale and writing the following words on a tablet: "Tollite me, et [mittite in mare]" which means "Pick me up and [throw me into the sea]" (Jonah 1:12). The gesture that he was ready to give up his life to save his companions from certain death during the raging storm was seen as a prefiguration of the sacrifice of Christ. Augustine of Hippo wrote in a letter: "And as Jonah suffered this for the sake of those who were endangered by the storm, so Christ suffered for the sake of those who are tossed on the waves of this world." Attribution An inscription on the