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In page John of the Cross:

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John of the Cross is considered one of the foremost poets in Spanish. Although his complete poems add up to fewer than 2,500 verses, two of them, the Spiritual Canticle and the Dark Night of the Soul, are widely considered masterpieces of Spanish poetry, both for their formal style and their rich symbolism and imagery. His theological works often consist of commentaries on the poems. All the works were written between 1578 and his death in 1591.[citation needed]