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"Cantares Gallegos," a collection of poems by Rosalía de Castro, was published in 1863. Written in the Galician language, the work celebrates the culture and traditions of Galicia, a region in northwestern Spain. The poems explore themes of love, loss, and the beauty of the Galician landscape. "Cantares Gallegos" is considered a masterpiece of Galician literature and played a significant role in the revival of the Galician language and culture.