Petrarch's writings refer to the body of work produced by Francesco Petrarca, an Italian poet and scholar, in the 14th century. His poetry, particularly the 'Canzoniere,' is considered a cornerstone of Renaissance literature and embodies the humanist ideals of the period, focusing on themes of love, nature, and individual experience. Petrarch's revival of classical texts and his emphasis on personal expression laid the groundwork for later writers and thinkers during the Renaissance.