Wallis (Wallisian: Uvea) is a Polynesian atoll/island in the Pacific Ocean belonging to the French overseas collectivity (collectivité d'outre-mer, or COM) of Wallis and Futuna. It lies north of Tonga, northeast of Fiji, east-northeast of the Hoorn Islands, east of Fiji's Rotuma, southeast of Tuvalu, southwest of Tokelau and west of Samoa. Its area is almost with 8,333 people. Its capital is Mata Utu. Roman Catholicism is the predominant religion. Its highest point is Mount Lulu Fakahega (). Wallis is of volcanic origin with fertile soil and some remaining lakes. Rainfall is plentiful. It was part of the Tongan maritime empire from around the 13th to 16th century. By that time the influence of the Tui Tonga had declined so much that Uvea became important in itself. The big fortress of Talietumu close to Lotoalahi in Mua was the last holdout of the Tongans until they were defeated. The island was renamed "Wallis" after a Cornish navigator, Captain Samuel Wallis, who saw it while sailing aboard on 16 August 1767. On 5 April 1842, the authorities of Wallis Island requested protection by France with a protectorate treaty signed in April 1887. After a referendum in 1959, Wallis became a French Overseas Territory in 1961. The island has an area of and a circumference of c. . Its highest point is Mount Lulu Fakahega, which rises . There are also a few large lakes such as Lake Lalolalo. These crater lakes attest to the island's volcanic origin. Some of the lakes, such as Lalolalo and Lanu'tavake appear as almost perfect circles with straight vertical walls. Wallis Island is located northeast of Futuna and Alofi islands which form the Hoorn archipelago. Together with some 15 smaller islands surrounding it, on its huge barrier reef, it forms the Wallis archipelago. Wallis has a fertile volcanic soil and sufficient rainfall to allow subsistence farming.