The Treaty of Waitangi (Māori: Te Tiriti o Waitangi), sometimes referred to as Te Tiriti (lit. 'The Treaty'), is a document of central importance to the history of New Zealand, its constitution, and its national mythos. It has played a major role in the treatment of the Māori people in New Zealand by successive governments and the wider population, something that has been especially prominent from the late 20th century. Although the Treaty of Waitangi is not incorporated as a binding international treaty within New Zealand's domestic law, its status at international law is debated. It was first signed on 6 February 1840 by Captain William Hobson as consul for the British Crown and by Māori chiefs (rangatira) from the North Island of New Zealand. The treaty's status has clouded the question of whether Māori had ceded sovereignty to the Crown in 1840, and if so, whether such sovereignty remains intact.
The treaty was written at a time when the New Zealand Company, acting on behalf of large numbers of settlers and would-be settlers, was establishing a colony in New Zealand, and when some Māori leaders had petitioned the British for protection against French ambitions. Once it had been written and translated, it was first signed by Northern Māori leaders at Waitangi. Copies were subsequently taken around New Zealand and over the following months many other chiefs signed. Around 530 to 540 Māori, at least 13 of them women, signed the Māori language version of the Treaty of Waitangi, despite some Māori leaders cautioning against it. Only 39 signed the English version. An immediate result of the treaty was that Queen Victoria's government gained the sole right to purchase land. In total there are nine signed copies of the Treaty of Waitangi, including the sheet signed on 6 February 1840 at Waitangi.