Which Salvador Dalí painting from 1955 depicts the Last Supper inside a transparent dodecahedron?

Salvador Dalí’s 1955 painting depicting the Last Supper inside a transparent dodecahedron is The Sacrament of the Last Supper.

The composition presents Christ and the apostles around a table beneath a transparent geometric structure. The dodecahedron, a solid with twelve pentagonal faces, gives the familiar biblical scene an unusually mathematical setting. Dalí used geometry to suggest order, harmony and a structure extending beyond ordinary space.

A large human figure appears in the background with outstretched arms, creating a second layer of symbolism behind the meal. The painting belongs to Dalí’s later period, when religious themes, classical composition and scientific ideas increasingly appeared together.

The work is held by the National Gallery of Art in Washington, D.C. It is sometimes confused with other modern Last Supper interpretations, but the transparent dodecahedron is the distinctive identifying feature of Dalí’s version.