by Robert Anton Wilson and Robert Shea also reference Joachim of Fiore repeatedly. His writings fit well with the eschatological tone of the story. The authors attempt to confuse matters and give an air of authenticity to the madness of the various plotlines by including references to real people and events. A hoax circulated that Barack Obama referred to Joachim's third age three times in his campaign speeches during the 2008 presidential election. He is said to have spoken of him as a master of contemporary civilization who had sought to create a better world, but there is no evidence Obama ever quoted or mentioned Joachim. Works Liber Concordiae Novi ac Veteris Testamenti (Harmony of the Old and New Testaments/Book of Concordance), completed in 1200. Expositio in Apocalipsim (Exposition of the Book of Revelation), finished around 1196–1199. The Liber introductoris in Apocalypsim, sometimes cited as a separate work, forms an introduction to this. Psalterium Decem Cordarum (Psaltery of Ten Strings). Tractatus super quatuor Evangelia (Treatise on the four Gospels). Lesser works include: Genealogia (Genealogy), written about 1176. De prophetia ignota, dateable to 1184. Adversus Judeos (also known as Exhortatorium Iudeorum), probably written in the early 1180s. De articulis fidei, probably written in the early 1180s. Professio fidei, probably written in the early 1180s. Tractatus in expositionem vite et regule beati Benedicti, sermons belonging to the late 1180s. Praephatio super Apocalipsim. Written around 1188–1192. Intelligentia super calathis. Written in 1190–1. De ultimis tribulationibus, which is a short sermon by Joachim. Enchiridion super Apocalypsim. Written in 1194-6, this is an earlier and shorter version of the Liber introductorius that prefaces Joachim's Expositio in Apocalipsim. De septem sigillis. It is uncertain when this was written. The Liber figurarum was drawn together soon after Joachim's death in 1202, and is a collection of 24 'figurae' drawn by Joachim. The name was used in thirteenth-century manuscripts to describe a work attributed to Joachim of Fiore, but it was only in the mid-twentieth century that it was identified in relation to three extant manuscripts. The late thirteenth-century set of pseudo-prophecies, united with a later series under the title Vaticinia de Summis Pontificibus was falsely attributed to Joachim of Fiore without any basis in truth.<ref>{{cite web |url=http://www.research-projects.unizh.ch/p2061.htm |title=Frank Schleich, Ascende calve: the later series of the medieval pope prophecies |access-date=September 2, 2016}}</ref> See also Cult of the Holy Spirit Ernesto Buonaiuti (one of the first researchers in