Ripapa Island, also known earlier as Ripa Island, located just off the shore of Lyttelton Harbour, has played many roles in the history of New Zealand. A Māori fortified pā there played a key role in an internal struggle for the South Island Ngāi Tahu tribe in the early 19th century. Between 1873 and 1885, the island hosted a quarantine station, which was also used as a temporary prison for members of the Parihaka Māori settlement in Taranaki. Fort Jervois was built in 1886 as part of system of defences against a feared Russian invasion. The fort was in military use until the end of World War I, and again during World War II. It is the most complete Russian-scare fort still existing in New Zealand.