9.2 Petrarchan and Shakespearean Sonnet Forms

Sonnet Structure and Development

Sonnets are 14-line poems with fixed rhyme schemes, and the two major forms you need to know are the Petrarchan (Italian) and the Shakespearean (English). Each form organizes its 14 lines differently, which changes how the poem's argument or emotion unfolds. Understanding the structural differences helps you analyze why a poet chose one form over the other.

Structure of Petrarchan vs. Shakespearean Sonnets

The Petrarchan (Italian) sonnet splits its 14 lines into two unequal parts:

• The octave (first 8 lines) presents a problem, question, or emotional situation. Its rhyme scheme is always ABBAABBA.
• The sestet (final 6 lines) offers a resolution, answer, or shift in perspective. The rhyme scheme varies: CDECDE, CDCDCD, or CDEDCE are all common.

The Shakespearean (English) sonnet divides its 14 lines into four parts:

• Three quatrains (4 lines each) develop the theme progressively, with each quatrain often approaching the subject from a new angle. The rhyme scheme is ABAB CDCD EFEF.
• A final couplet (2 lines, rhyming GG) delivers a summary, reversal, or epigrammatic punch.

The volta (turn) is the moment in a sonnet where the argument or emotion shifts direction. In a Petrarchan sonnet, the volta typically falls between the octave and the sestet, right at line 9. In a Shakespearean sonnet, it usually arrives just before the final couplet, at line 13. This difference matters: the Petrarchan form gives the poet six full lines to develop the turn, while the Shakespearean form compresses it into just two lines, creating a sharper, more concentrated effect.

Themes in Petrarchan vs. Shakespearean Sonnets

Petrarchan sonnets tend to focus on courtly love and idealized beauty. Petrarch's own sonnets revolve around Laura, an unattainable beloved who inspires both devotion and emotional turmoil. The speaker typically suffers from unrequited love, and the poems explore the contradictions of desire through formal, elevated language. A signature technique is the conceit, an extended metaphor sustained across multiple lines (the heart as a besieged fortress, the beloved's eyes as twin suns).

Shakespearean sonnets cover broader thematic ground. Love is still central, but Shakespeare also wrestles with time, mortality, beauty's decay, and the power of poetry itself. His tone tends to be more personal and introspective, and his language is notably more conversational, incorporating puns, wordplay, and natural speech rhythms. Where Petrarch idealizes, Shakespeare often complicates or even subverts.

The structural differences reinforce these thematic tendencies:

• The Petrarchan octave-sestet division naturally supports a problem-resolution structure: present the emotional conflict, then respond to it.
• The Shakespearean three-quatrain structure supports a building argument, where each quatrain adds a new layer of evidence or perspective, and the couplet clinches the point (or overturns it entirely).

Influence and Innovation

Petrarch's Influence on Renaissance Poetry

Petrarch didn't write in English, so his influence arrived through translators and adapters. Sir Thomas Wyatt and Henry Howard, Earl of Surrey were the key figures who brought the sonnet form to England in the early sixteenth century. Wyatt translated Petrarch's sonnets fairly closely, while Surrey began modifying the rhyme scheme toward what would become the English sonnet form.

Along with the form itself, English poets adopted a whole set of Petrarchan conventions:

• Stock images like ice and fire to represent the contradictions of love
• The heart as a fortress under siege
• Idealization of the beloved as impossibly beautiful and virtuous
• Exploration of conflicting emotions (desire mixed with despair, devotion mixed with frustration)

These conventions became the foundation for English sonnet sequences, where a poet writes a series of interconnected sonnets telling a larger story. Sidney's Astrophil and Stella (1591) was the first major English sonnet sequence, and Spenser's Amoretti (1595) followed soon after. Petrarchan themes also spilled beyond the sonnet form, shaping courtly love poetry more broadly across the English Renaissance.

Shakespeare's Innovations in the Sonnet Form

Shakespeare took the inherited sonnet tradition and pushed it in several new directions:

• Structural innovation: He fully established the three-quatrain-plus-couplet form, using the final couplet for epigrammatic wit or a surprising reversal that reframes everything before it.
• Thematic expansion: His 154 sonnets address male friendship, patronage, jealousy, and aging alongside romantic love. Sonnet 130 ("My mistress' eyes are nothing like the sun") directly subverts Petrarchan beauty standards by refusing to idealize the beloved.
• Linguistic range: Shakespeare integrated colloquial language and natural speech patterns into the sonnet, using complex enjambment (carrying a sentence across line breaks) and caesura (mid-line pauses) to create rhythmic variety within the iambic pentameter.
• Character and narrative: His sonnet sequence creates distinct personas, most notably the Fair Youth and the Dark Lady, and develops something close to a narrative arc across the full sequence.

These innovations made the Shakespearean sonnet a distinct literary form, and its influence on English-language poetry has been enormous ever since.