Ildefons Cerdà. Plan of the environs of the city of Barcelona and project for its improvements and enlargement, 1859 (no.51)
Lithograph (1861), 77 x 115 cm. Museu d'Historia de la Ciutat, Barcelona.

The Cerdà plan for the Eixample (Enlargement), highlighted in yellow, consists of a square grid 133 m. x 133 m. with 20 m. wide streets, cut through by two large diagonal avenues.