Oscar Wilde (1854-1900) was an Irish poet and playwright. After writing in different forms throughout the 1880s, he became one of the most popular playwrights in London in the early 1890s. At the height of his fame and success, while The Importance of Being Earnest (1895) was still being performed in London, Wilde prosecuted the Marquess of Queensberry for criminal libel. The Marquess was the father of Wilde's lover, Lord Alfred Douglas. The libel trial unearthed evidence that caused Wilde to drop his charges and led to his own arrest and trial for gross indecency. After two more trials he was convicted and sentenced to two years' hard labour, the maximum penalty, and was jailed from 1895 to 1897. During his last year in prison, he wrote De Profundis (published posthumously in 1905), a long letter which discusses his spiritual journey through his trials. On his release, he left immediately for France, and never returned to Ireland or Britain.