What if a single glance at a stranger changed your life forever? That is what happened to an Italian poet named Francesco Petrarch. On April 6, 1327, he walked into a church in the city of Avignon, France. There, he saw a young woman named Laura, and the moment changed his life forever. He never spoke to her that day, but he went home and began writing poems about what he felt. Petrarch described Laura's beauty, the ache of admiring someone from a distance. The way a single glimpse of a person could fill your mind for days. Over the next several decades, he wrote 366 poems collected in a book called the Canzoniere. What made Petrarch's poems special was their focus on real, personal emotion. Before Petrarch, most European poetry was about heroes, battles, and religious devotion. Petrarch wrote about something smaller but just as powerful: the experience of one person's feelings. He described joy, sadness, hope, and longing in language so vivid that readers felt like they were inside his heart. Petrarch's style became enormously influential. Poets across Europe began imitating his form, especially the Petrarchan sonnet -- a fourteen-line poem with a specific rhyme pattern. Centuries later, William Shakespeare adapted this form into the English sonnet. Every love poem that explores personal feelings traces back to Petrarch standing in that church, looking across the room.