An article on double-cloth in ancient Peruvian textiles, drawing on six examples in the Science Museum of Minnesota. It describes the structure (two interpenetrating layers with separate warp and weft), materials (mostly brown and white cotton, some wool and alpaca), backstrap-loom process, four-selvage construction, and design. It compares ancient practice with modern four-harness double weave, with cross-section diagrams and threading drafts for patterned double cloth.