King's Island is an area of central Limerick, Ireland. The area is often referred to colloquially as The Island and consists of two distinct areas, Englishtown and St Mary's Park. The historical city of Limerick known as Englishtown is located on the southern end and St Mary's Park; a local authority housing estate is located on the northern end. The island is formed from a distributary of the River Shannon. The Abbey River diverts from the Shannon before meeting it again at a confluence near the Potato Market. The island probably took its name after the 13th-century English King John's Castle was built. However, a 150AD map by Ptolemy shows a place called 'Regia' at the same site as King's Island, and history suggests the presence of earlier settlements in the area. The island's location offers an ideal defensive position at a natural river crossing. Englishtown In times past, the ancient city of Limerick itself was entirely contained in the area now known as Englishtown as a walled city. The Vikings established the city in this area following the Viking Invasion of Ireland. After the Norman Invasion of Ireland, the city was taken by Norman or Old English settlers. It is from this time that the area became referred to as Englishtown and also to distinguish it from Irishtown south of the Abbey River which was populated by native Irish. It was during the Norman Conquest that many of the city's landmarks were built in this district such as the 13th century King John's Castle and the 800-year-old St Mary's Cathedral. Nicholas Street and Mary Street on the island formed the medieval city centre of Limerick and are perhaps the oldest streets in the city. Samuel Lewis writing in 1837 in his Topographical Dictionary of Ireland describes Limerick's old city of Englishtown as resembling the city of Rouen, Normandy with the housing built in Flemish fashion. Even by then though there is evidence the district was in decline as he describes the area as exhibiting a 'dirty & neglected appearance'. Following the development of Newtown Pery the city centre shifted south to the present day centre of the city and the Englishtown area lost its position as the fashionable area of the city. By the late 18th Century the old continental style cramped lofty Dutch & Flemish houses that once characterised the area were transformed into tenements and rented to