Soneto CLXVI, written by Luis de Góngora, is a quintessential example of Spanish Baroque poetry that explores themes of beauty and the transient nature of life. The poem is structured as a sonnet and uses rich imagery and metaphors to depict the physical beauty of a beloved while simultaneously acknowledging the inevitable decay brought by time. Góngora's work embodies the contrast between the allure of youth and the certainty of mortality.