The 18th century marked a pivotal era in European theatre. The Age of Enlightenment brought new ideas, while the rise of the middle class increased demand for entertainment. This period saw the emergence of neoclassicism, sentimentalism, and influential playwrights like Molière and Sheridan. Theatre genres diversified, including sentimental comedy, bourgeois tragedy, and ballad opera. Staging innovations like the proscenium arch and gas lighting enhanced productions. Acting styles evolved, emphasizing both declamatory and realistic approaches. These developments laid the groundwork for modern theatre practices.