A poem that has 14 lines is called a sonnet. Sonnets traditionally have a specific rhyme scheme and are often written in iambic pentameter. They usually reflect on a single sentiment or idea, with a turn of thought called a "volta" occurring around the ninth line. There are various types of sonnets, including the Petrarchan (Italian) sonnet and the English (Shakespearean) sonnet, each with distinct rhyme schemes and structures.