Greater London is often referred to as "the City" or "the Square Mile" and it forms the main financial district. Archaically, the urbanised area of London was known as the Metropolis. In common usage, the terms "London" and "Greater London" are usually used interchangeably. Greater London is officially divided for some purposes, with varying definitions, into Inner London and Outer London. For some strategic planning purposes it is divided into five sub-regions. Greater London is under the strategic local governance of the Greater London Authority (GLA). It consists of an elected assembly, the London Assembly, and an executive head, the Mayor of
City, University of London that make up the University. The university has strong links with the City of London, and the Lord Mayor of London serves as the University's Rector. The university has its main campus in central London in the Islington borough, with additional campuses in Islington, the City, the West End and East End. It is organised into seven schools, within which there are around 40 academic departments and centres, including: the Department of Journalism, the Cass Business School, and City Law School which incorporates the Inns of Court School of Law. The annual income of the institution for 2016–17 was £227.0