Regency-era England refers to the period from 1811 to 1820 when King George III was deemed unfit to rule due to mental illness, leading to his son, the Prince of Wales, becoming the Regent. This era is known for its distinctive cultural developments, including literature, fashion, and architecture, with notable figures like Jane Austen and Lord Byron emerging during this time. The Regency period was marked by significant social change, including the rise of the middle class and shifts in gender roles. The era also saw the expansion of the British Empire and advancements in technology, such as the steam engine, which transformed transportation and industry.