Rotorua () is a city in the Bay of Plenty Region of New Zealand's North Island. The city lies on the southern shores of Lake Rotorua, from which it takes its name. It is the seat of the Rotorua Lakes District, a territorial authority encompassing Rotorua and several other nearby towns. Rotorua has an estimated resident population of , making it the country's 12th largest urban area, and the Bay of Plenty's second largest urban area behind Tauranga. Rotorua is a major destination for both domestic and international tourists; the tourism industry is by far the largest industry in the district. It is known for its geothermal activity, and features geysers – notably the Pōhutu Geyser at Whakarewarewa – and hot mud pools. This thermal activity is sourced to the Rotorua Caldera, in which the town lies. Rotorua is home to the Toi Ohomai Institute of Technology. History The name Rotorua comes from the Māori language, where the full name for the city and lake is . Roto means 'lake' and rua means 'two' or in this case 'second' – Rotorua thus meaning 'Second lake'. Kahumatamomoe was the uncle of the Māori chief Ihenga, the ancestral explorer of the Te Arawa. It was the second major lake the chief discovered, and he dedicated it to his uncle. It is the largest of a multitude of lakes found to the northeast, all connected with the Rotorua Caldera and nearby Mount Tarawera. The name can also mean the equally appropriate 'Crater lake'. The area was initially settled by Māori of the Te Arawa Iwi in the 14th century. During the early 1820s Ngāpuhi led by chief Hongi Hika launched a series of raids into the Bay of Plenty as a part of the Musket Wars, in 1823 a Ngapuhi raiding party led by Hongi Hika attacked Te Arawa at their Pā (Fortified settlement) on Mokoia Island defeating them. The first European in the area was probably Phillip Tapsell who was trading from the Bay of Plenty coast at Maketu from 1828. He later married into Te Arawa and became highly regarded by them. Missionaries Henry Williams and Thomas Chapman visited in 1831 and Chapman and his wife established a mission at Te Koutu in 1835. This was abandoned within a year but Chapman returned in 1838 and established a second mission at Mokoia Island. The lakeshore was a prominent site of skirmishes