Short answers, pulled from the story.
Juan Boscán Almogáver (c. 1490-1542) was a Spanish poet born in Barcelona who introduced the Italian hendecasyllable and the present-day sonnet structure into Castilian verse. He is regarded as the first poet to bring Italian metres to Spain, a shift that shaped the Spanish Renaissance literary tradition.
Andrea Navagero, the Venetian ambassador to Spain, persuaded Boscán in the 1520s to abandon the traditional eight-syllable Spanish verse and write instead in the eleven-syllable Italian hendecasyllable. This conversation is considered a turning point in Spanish literary history.
Boscán translated Count Baldassare Castiglione's "Il Cortegiano" into Spanish at the urging of Castiglione and Garcilaso de la Vega. It was published on the 2nd of April 1534 and was received with great success.
Between 1543 and 1597, twenty-one editions of "Las obras de Boscán y algunas de Garcilaso de la Vega repartidas en quatro libros" were printed throughout Europe. The collection was published by his widow around 1543, after Boscán died on the 21st of September 1542.
"Capítulo", found in volume three of Las obras, is notable for pivoting in its final thirty-two tercets to describe Timanthes's ancient painting "The Sacrifice of Iphigenia". Scholar Carlos Clavería identifies it as one of the earliest examples of ekphrasis in Iberian Renaissance poetry.
In 2004, the British rock band Electrelane adapted Boscán's poem "Oh Sombra!" into a song. It is one of the few known instances of his work being directly adapted into modern popular music.