1472/07/26
Juan Cortada & José de Manjarrés with Josefina Roma (1848). El libro verde de Barcelona. Añalejo de costumbres populares, fiestas religiosas y profanas, usos familiares, efemérides de los sucesos mas notables acaecidos en Barcelona. Barcelona: Sauri. [Private collection: GBS OCR too poor to use.] [more]
The troops of John II took Monjuich because (according to the diary of the old regional delegation) de aquells grans besties que lo tenien, of those great beasts they had.
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I think these are some rather impressive siege engines rather than elephants. See this related post.