Maungakiekie / One Tree Hill is a 182-metre (597 ft) volcanic peak and Tūpuna Maunga (ancestral mountain) in Auckland, New Zealand.

[5] The tihi (summit) of the maunga was where the umbilical cord of Ngāti Awa rangatira Korokino was buried and a tōtara tree sprig was planted on top, giving rise to the name Te Tōtara-i-āhua ("The Tōtara That Stands Alone"), another common name for the mountain used by Tāmaki Māori.

[10] Kiwi Tāmaki, the third paramount chief of Waiohua, moved the seat of power of the confederation from Maungawhau / Mount Eden to Maungakiekie / One Tree Hill.

[14][15] Kiwi Tāmaki and most of the people of Maungakiekie / One Tree Hill did not live permanently at the mountain, instead migrating across circuits of the Auckland region collecting resources.

[17] After the war, Te Taoū settled on the isthmus, and chief Tuperiri constructed a pā below the summit of Maungakiekie / One Tree Hill, known as Hikurangi.

[5] In 1844, Ngāti Whātua chiefs sold a block of land which included Maungakiekie / One Tree Hill to a merchant, Thomas Henry.

[21] Henry had referred to his property as Mt Prospect, however after the purchase Campbell renamed the farm the One Tree Hill Estate.

[21] In 1874, Campbell returned to Auckland and took sole ownership of the property, planning to build an Italian-style mansion adjacent to the mountain.

[26] In 1880, after the death of his daughter Ida, Campbell decided to gift the One Tree Hill Estate to the public,[27] leasing the land to Chinese market gardener Fong Ming Quong in the mean-time.

[28] In 1901, Campbell formally handed over the land to the public during the visit of the Duke and Duchess of Cornwall in 1901 (who later became King George V and Queen Mary of Teck).

[7] Due to the spiritual and cultural significance of Maungakiekie / One Tree Hill to Māori, and for pedestrian safety, the summit road was permanently closed to most vehicles in March 2019.

[36] Cornwall Park, which adjoins the One Tree Hill Domain, was given by Sir John Logan Campbell to a private trust he had established to hold the land for the use of the public.

The legislation specified that the land be held in trust "for the common benefit of Ngā Mana Whenua o Tāmaki Makaurau and the other people of Auckland".

It lies in the middle of the viewing platform, on axis with the main memorial plaques on the Obelisk base and the bronze Warrior Statue.

[47] A second attack in October 2000 left the tree unable to recover, and it was removed the following year by Auckland Council due to the risk of it falling.

[48] In 2007, the chainsaw used by activist Mike Smith in the first attack was placed on sale on auction site TradeMe,[49] but withdrawn by the website after complaints and a poll of users.