The term Middle English literature refers to the literature written in the form of the English language known as Middle English, from the late 12th century until the 1470s. During this time the Chancery Standard, a form of London-based English became widespread and the printing press regularized the language. Between the 1470s and the middle of the following century there was a transition to early Modern English. In literary terms, the characteristics of the literary works written did not change radically until the effects of the Renaissance and Reformed Christianity became more apparent in the reign of King Henry VIII. There are three main categories of Middle English literature, religious, courtly love, and Arthurian, though much of Geoffrey Chaucer's work stands outside these. Among the many religious works are those in the Katherine Group and the writings of Julian of Norwich and Richard Rolle. After the Norman conquest of England, Law French became the standard language of courts, parliament, and society. The Norman dialects of the ruling classes mixed with the Anglo-Saxon of the people and became Anglo-Norman, and Anglo-Saxon underwent a gradual transition into Middle English. Around the turn of the thirteenth century, Layamon wrote in Middle English. Other transitional works were popular entertainment, including a variety of romances and lyrics. With time, the English language regained prestige, and in 1362 it replaced French and Latin in Parliament and courts of law. Early examples of Middle English literature are the Ormulum and Havelock the Dane. In the fourteenth century major works of English literature began once again to appear, including the works of Chaucer. The latter portion of the 14th century also saw the consolidation of English as a written language and a shift to secular writing. In the late 15th century William Caxton printed four-fifths of his works in English, which helped to standardize the language and expand the vocabulary. Early period After the Norman conquest of England, the written form of the Old English language continued in some monasteries but few literary works are known from this period. Under the influence of the new aristocracy, Law French became the standard language of courts, parliament, and polite society. As the invaders integrated, their language and literature mingled with that of the natives. The Norman dialects of the ruling classes became Anglo-Norman, and Old English underwent a gradual transition into Middle English. Political power was no longer in English