House-induced amnesia

House-induced amnesia is the House’s effect on its inhabitants’ memory, sense of time, and, potentially, personality. Its defining paradox is that Piranesi can recall every Hall he has visited while forgetting other parts of his life; as he discovers the extent of those gaps, the House becomes both the proposed cause of his condition and the place he continues to trust.

Nature and Pattern

The Other describes the labyrinth as a force that makes people forget and can unpick a person’s entire personality. He reveals that the discussion about abandoning the search for knowledge has happened before: this is the third such conversation, and Piranesi’s wish to stop has returned roughly every eighteen months. The recurrence turns what Piranesi understood as a present decision into evidence of a repeating cycle he cannot remember.

The impairment is selective rather than a simple loss of all memory. Piranesi insists that he remembers every Hall he has ever visited and gives the exact count as 7,678. The Other agrees that his memory of the labyrinth is intact, but says that he forgets other things and loses time. In particular, he gets days and dates wrong; the Other says that these errors have repeatedly disrupted their meetings, leaving Piranesi absent when expected and requiring the Other to correct his sense of the calendar.

Recognition Through the Journals

Piranesi’s understanding changes when he reads a journal entry describing the later conviction of Arne-Sayles for kidnapping another young man and the reopening of the case of the missing Giussani. Although the entry is in his own handwriting, its references to Birmingham and Perugia seem meaningless to him. He concludes that he has forgotten much more than the Other’s account suggested and recognizes that he had experienced serious mental derangement in the past. The written record preserves a version of his life that his present consciousness cannot interpret.

The journals also make the gaps in his personal history measurable. Piranesi estimates that he is about thirty-five, but the ten journals in his possession cover only five years. He concludes that he must have renumbered them himself and that twenty journals are missing. Their absence raises unanswered questions about his earlier life and about what happened during the years for which he has no records.

Consequences and Response

After encountering evidence of his past condition, Piranesi leaves the journal on the pavement and walks away from it. He later reconsiders his initial wish to be rid of the journals, deciding that they may help him understand the people who lived before him and identify what triggers his illness. Because reading them also provokes painful emotions and disturbing thoughts, he resolves to proceed cautiously and read only small portions at a time.

He also plans practical changes in response to what he has learned. He intends to conceal the extent of his difficulties from the Other, whose suspicion he fears, and to take better care of himself: continuing to fish so that he has food, mending his clothes, and making coverings for his feet. These resolutions show how the memory problem reaches beyond recollection, affecting his safety, daily routines, and judgment about whom to trust.

The House as Cause and Paradox

Piranesi accepts the House as the cause of his forgetting because both the Other and the Prophet have described it as a source of madness and forgetfulness. He reasons that two authorities he regards as learned agree on the explanation. Yet his trust in the House remains intact: after asking himself whether he trusts it, he answers that he does. The belief that the House harms his mind therefore coexists with an affirmative attachment to it, rather than replacing that attachment.

The contrast between preserved and lost memory shapes the concept’s significance. Piranesi’s astonishingly precise knowledge of the Halls does not protect his personal history, and the journals cannot immediately restore what he has forgotten: their words remain legible while their meanings have become inaccessible. House-induced amnesia is thus revealed through both repetition and documentary gaps—a cycle Piranesi cannot recall, and a written past he must approach carefully in order to understand it.