Derry (/ˈdɛrɪ/), officially Londonderry (/ˈlʌndənˌdɛrɪ/), is the second-largest city in Northern Ireland and the fourth-largest city on the island of Ireland. The name Derry is an anglicisation of the Irish name Daire or Doire meaning "oak grove". In 1613, the city was granted a Royal Charter by King James I and gained the "London" prefix to reflect the funding of its construction by the London guilds. While the city is more usually known colloquially as Derry, Londonderry is also commonly used and remains the legal name.