“Alogon #3” is an installation artwork by Robert Smithson, created in 1967 and associated with the Minimalism art movement. The artwork features a sequence of gradually diminishing rectangular blocks affixed to a white wall, extending horizontally. The geometric progression from larger to smaller forms creates a sense of depth and perspective, embodying Smithson’s exploration of spatial relationships and minimalist aesthetics. This careful arrangement of identical units utilizing uniform spacing and subtle tonal variations in the materials underscores the minimalist emphasis on simplicity, repetition, and the interaction between the artwork and its environment.