A masterwork of impossible architecture, this lithograph depicts a multi-storied structure whose columns and beams simultaneously connect to contradictory levels, defying the laws of spatial logic. Figures populate the building's terraces and interior, seemingly unaware of the structural impossibility surrounding them, while a figure at the base studies a Necker cube — the conceptual key to the entire illusion. Escher's meticulous draftsmanship transforms architectural paradox into a hauntingly believable world suspended between reality and impossibility.