The alleged Plan of Provins
Foucault's PendulumThe alleged Plan of Provins is the supposed secret program encoded in a message attributed to the Templars of Provins. Casaubon and Belbo treat its fragments as instructions for a centuries-long succession of hidden groups, assigning destinations, meetings, and historical roles to scattered clues. Yet the Plan’s decisive significance lies in the gap between discovery and invention: the men do not uncover a coherent conspiracy so much as build one by connecting suggestive details, and the imagined structure gains consequences when others accept it as real.
The Message and Its Proposed Structure
The surviving text opens with a message coded by the method of Trithemius, including the phrase about thirty-six invisibles divided into six bands. Other fragments invoke Saint John, hay wains, sealed messages, knights in white cloaks, and an “ordonation.” Casaubon and Belbo reread the document left by Colonel Ardenti after years apart from it. The message’s archaic wording does not, by itself, establish the historical system they infer; its obscurity instead gives them room to assemble one.
Casaubon’s reconstruction translates the scattered phrases into a six-part design. He reads the message as calling for six groups to settle in six places, with successive masters meeting at intervals of twenty years. The sequence is said to span 120 years, beginning in 1344, and the instructions are treated as a plan rather than a straightforward account. In this reading, missing or ambiguous phrases become links to be supplied through historical analogy.
The proposed route begins in Portugal, where the Templars are associated with Tomar, and proceeds to England, France, Germany, Bulgaria, and Jerusalem. The numbered places are not merely locations: each becomes a stage in a chain of succession, and each gap in the document invites Casaubon and Belbo to infer what the next stage must have been. This interpretive method turns a fragmentary text into a map of hidden continuity.
Building the Route
Casaubon proposes Paris as the third place, the Refuge where the Templars who left the Paris Temple could have remained concealed. He presents this as a more economical route than sending the group elsewhere: the Templars could live under another name until political conditions changed and they could emerge into public life. The argument is not presented as a discovered fact but as a plausible solution within the system they are constructing.
For the fourth location, Casaubon rejects Chartres, which Colonel Ardenti had considered, because he wants the route to include Europe’s supposed centers in a broader pattern. He shifts from a mystical trail to a political one, reads the course as a sine wave, and interprets “Beyond the water” as a place beyond the Rhine. The city of the Virgin near Danzig becomes Marienburg, seat of the Teutonic Knights. Its historical relationship with the Templars supplies a further bridge: Casaubon contrasts the Teutonic Knights with the Knights Hospitaller, whom he describes as having benefited from the Templars’ suppression.
The fifth station is placed in the Balkans. Casaubon links the Paulicians with the Crusaders’ encounters near Antioch and at Constantinople, then proposes that Templar contact with such communities could connect the groups in the Plan. He identifies the Bulgarian Bogomils as possible successors to the Paulicians, while acknowledging that the Templars of Provins could not have anticipated Bulgaria’s later conquest by the Turks. The explanation depends on a retrospective chain of religious and political associations, not on an independently verified record of a meeting.
For the final appointment, Casaubon reads the message’s reference to “the Stone” as pointing to the rock venerated by Muslims at the center of the Mosque of Omar in Jerusalem, on the site associated with the Templars’ former headquarters. He speculates that a concealed core group or connected cabalists might have waited there. The route from Germany to Jerusalem, passing through the Balkans, then appears to him both logical and economical. Each answer makes the next inference feel more persuasive, while the system itself supplies the terms by which the answers are judged.
Timetable, Succession, and Secrecy
The timetable assigns Portugal, England, France, Germany, Bulgaria, and Jerusalem to the years 1344, 1464, 1584, 1704, 1824, and 1944. In Casaubon and Belbo’s reconstruction, the first grand masters establish themselves at the six locations in 1344; six masters succeed one another within each group over 120 years. The sixth master of Tomar meets the sixth English master in 1464, and the twelfth English master meets the twelfth French master in 1584. The same pattern is projected forward until the appointment with the Paulicians is expected to fail in 1824.
The Plan’s supposed safeguards explain why its members cannot simply repair a broken link. Belbo argues that each master knows how to contact the master of the following group, but not the other groups; later groups likewise cannot locate their predecessors. If the Germans lose contact with the Bulgarians, they cannot identify the Jerusalem group. The message is also imagined to have been divided so that a single missing piece makes the whole sequence incomprehensible, and possession of an incomplete fragment offers no practical advantage. Secrecy is thus made to account for both the Plan’s survival and the absence of decisive evidence for it.
This structure also makes the Plan resistant to correction. A failed appointment does not necessarily disprove the system: the failure can be interpreted as an anticipated break in the chain, while the scattered groups and inaccessible messages explain why no one can verify what followed. The narrative shows how the explanatory model can absorb uncertainty by converting missing information into evidence of careful concealment.
From Historical Puzzle to Political Myth
The Plan expands beyond the supposed medieval instructions as Casaubon, Belbo, and Diotallevi apply its logic to later political history. They connect the Paulicians with the emergence of anti-Semitic conspiracy narratives and treat the Protocols as a possible initiative of the Paulician branch. Belbo’s account divides a supposed Jerusalem group into branches associated with neo-Templars, Baconians, and Russia. These claims belong to the characters’ invented construction, not to an established history of the groups they name.
The discussion nevertheless traces a concrete history of textual borrowing and political use. The Protocols are described as twenty-four declarations whose claims about controlling the press, manipulating political movements, fomenting conflict, and seizing power contradict one another. The novel recounts how the text’s material was traced to Maurice Joly’s Dialogue aux enfers entre Montesquieu et Machiavel, a political pamphlet against Napoleon III, while the conspiratorial interpretation continues to absorb the discovery of plagiarism. Casaubon and his colleagues fold even this exposure into their theory, treating the Plan as a source that precedes and explains later versions.
The account further imagines a chain of fabrication involving Rachkovsky, Count Sergei Witte, and a pamphlet derived from Joly. In the characters’ reconstruction, material attacking Witte is altered by substituting Jews for Witte, then circulated in a form that helps turn political hostility into an alleged Jewish plot. The story they tell makes the Protocols at once a forged text and a useful instrument of political accusation. It also demonstrates how the Plan’s interpretive habits can recast documented textual relationships as proof of an imagined secret lineage.
At its most extreme, the same logic is used to explain the Holocaust. A character claims that the bureaucracy of genocide must have been a search for a hidden message carried by a representative of the Thirty-six Invisibles, and connects that imagined search to a supposed effort to locate telluric currents beneath a hollow Earth. This is not a valid explanation of the genocide; it is a horrifying example of the Plan’s ability to absorb historical atrocity into its own mythology. The conspiracy framework turns victims and persecution into instruments of a fictional puzzle, obscuring the actual human and political reality of the crime.
Invention, Belief, and the Empty Secret
The narrative makes explicit that the Plan is to be constructed, not discovered. The three men begin by trading fantasies and recognize that their associations are unwarranted. They regard their work as parody, yet repeated practice changes the way they think: connecting everything to everything else becomes automatic. Casaubon later distinguishes their different degrees of entanglement: he considers himself the least affected, Diotallevi is becoming corrupted, and Belbo is becoming converted. The distinction between pretending to believe and believing begins to collapse.
That transformation illuminates how the invented Plan becomes socially effective. The three men have made a nonexistent system, but its believers identify fragments of their own confused mythologies as moments in it, joined by analogy and suspicion. Once people accept the pattern and organize their actions around it, the Plan exists in practical effect. The anticipated hordes searching for its map are the consequence of an invention that has escaped the control of its inventors.
The Plan also answers a psychological demand for explanation. In the novel’s account, people confronted by failure or confusion may prefer an enemy and a hidden plot to the possibility that events have no single author. A secret promises to dispel frustration or offer salvation, but a disclosed answer risks seeming disappointingly small. The more the secret remains inaccessible, the more it can sustain belief, and the more every new clue can be taken as confirmation.
This logic comes to a personal climax in the later rite before the Pendulum. Belbo claims to possess a secret, and the conspirators’ desire to extract it gives him power over them. His denials do not end their pursuit; they intensify it, because refusal itself is interpreted as proof that the secret is genuine. The group’s long search has held its members together despite divisions and conflict, while the prospect of learning the answer threatens both disappointment and the end of the secret that binds them. The alleged Plan of Provins thus culminates not in a verified revelation, but in the force of an empty secret: a structure kept alive by the conviction that the missing answer must exist.