The Ibero-Amerikanisches Institut Preußischer Kulturbesitz (IAI; Ibero-American Institute at the Prussian Cultural Heritage Foundation) owns a collection of some 750 works of Mexican popular culture, the majority of which were illustrated by the printmaker and engraver José Guadalupe Posada (1851–1913) and printed by Antonio Vanegas Arroyo (1850–1917), whose company operated from the 1880s to the 1940s. The collection is comprised of a broad range of media, from chapbooks and magazines to Hojas sueltas (broadsheets). The texts of the published works cover a broad range of topics, on the one hand drawing on themes from Ibero-American—and especially Mexican—oral traditions and popular piety; and on the other hand, covering current affairs in Mexico and, to a lesser extent, abroad. The majority of the texts are in prose. Various forms of poetry, above all corridos (ballads), are also featured. The Posada Collection continues to be systematically enlarged and forms part of the Ibero-American Institute’s exceptionally rich collections of popular culture around 1900 from Latin America and the Iberian Peninsula. Completely in open access, it is one of the IAI’s most consulted digital collections.