Carol Diehl blogs about Gerhard Richter: Tapestries at Gagosian Gallery, London, on view through July 27, 2013.

Diehl writes: "The tapestries are based on a single scraped painting: Abstract Painting (724-4) (1990)… Woven on a mechanical jacquard loom, each tapestry represents a Rohrschach-like four-time multiplication of one quadrant of the original image. Dense and rich, they appear at once medieval and futuristic, tribal and Baroque, with varying texture, thick and thin, and colors that range from murky to brilliantly clear."