Austere seriality: an inspired pairing of two influential American conceptualists Working from the 1960s on, Lewis Baltz (1945-2014) and Sol LeWitt (1928-2007) developed pared-down visual languages to explore the structures of spatial processes and permutation. Baltz, in photographic series such as The Prototype Works, Tract Houses and Park City, united traditions of documentary photography and avant-garde...