Vista y Plano de Toledo 1610detail of the support canvas x-ray image with pattern analyses on top , deciphering the pattern at Lab Oweave draft generated at Lab O :woven on a loom with 14 shafts and 14 threadles ; repeat of 50 warps and 50 wefts source: Carmen Garrido ; Cuad. Art. Gr., 40, 2009, 53-6