Anglo-Norman language general use of the word "acre" for land measurement in Normandy until metrication in the 19th century, but these words are probably linguistic traces of Saxon or Anglo-Scandinavian settlements between the 4th and the 10th centuries in Normandy. Otherwise the direct influence of English in mainland Norman (such as "smogler" - to smuggle) is from direct contact in later centuries with English, rather than Anglo-Norman. When the Normans invaded England, Anglo-Saxon literature had reached a very high level of development. The important Benedictine monasteries both wrote chronicles and guarded other works in Old English. However, with the arrival of the
Anglo-Saxon art often needed to see the excavated and worn remains that survive as they once were. Perhaps the best known piece of Anglo-Saxon art is the Bayeux Tapestry which was commissioned by a Norman patron from English artists working in the traditional Anglo-Saxon style. Anglo-Saxon artists also worked in fresco, stone, ivory and whalebone (notably the Franks Casket), metalwork (for example the Fuller brooch), glass and enamel, many examples of which have been recovered through archaeological excavation and some of which have simply been preserved over the centuries, especially in churches on the Continent, as the Vikings, Normans and Reformation iconoclasm