Question: Two of London's 33 districts are cities: the City of London (the historic centre including Smithfield and Holborn) and which other?

The districts of England (also known as local authority districts or local government districts to distinguish from unofficial city districts) are a level of subnational division of England used for the purposes of local government.  As the structure of local government in England is not uniform, there are currently four principal types of district-level subdivision.  There are a total of 326 districts made up of 36 metropolitan boroughs, 32 London boroughs, 201 non-metropolitan districts, 55 unitary authorities, as well as the City of London and the Isles of Scilly which are also districts, but do not correspond to any of these categories.  Some districts are styled as boroughs, cities, or royal boroughs; these are purely honorific titles, and do not alter the status of the district.  All boroughs and cities, and a few districts, are led by a mayor who in most cases is a ceremonial figure elected by the district council, but – after local government reform – is occasionally a directly elected mayor who makes most of the policy decisions instead of the council. <SEP>  It was formerly known as Knightsriders Street, from the knights riding at the tournaments in Smithfield. Giltspur Street is a street in Smithfield in the City of London, running north-south from the junction of Newgate Street, Holborn Viaduct and Old Bailey, up to West Smithfield, and it is bounded to the east by St Bartholomew's Hospital. <SEP> The City of London is a city and county that contains the historic centre and central business district of London.  It constituted most of London from its settlement by the Romans in the 1st century AD to the Middle Ages, but the agglomeration has since grown far beyond the City's borders.  The City is now only a tiny part of the metropolis of London, though it remains a notable part of central London.  Administratively, it forms one of the 33 local authority districts of Greater London; however, the City of London is not a London borough, a status reserved for the other 32 districts (including London's only other city, the City of Westminster). <SEP> The parliamentary borough of Finsbury was a constituency of the House of Commons of the UK Parliament from 1832 to 1885, and from 1918 to 1950.  The constituency was first created in 1832 as one of seven two-seat "metropolis" parliamentary boroughs (five in southeast Middlesex and two in northeast Surrey) other than the two which already existed: Westminster and the City of London; the latter until 1885 retained an exceptional four seats.  Finsbury was directly north of the City of London and was smaller than the Finsbury division of the Ossulstone hundred but took in land of Holborn division (hundred division) to its southwest in pre-introduction changes by Boundary Commissioners.  It included Finsbury, Holborn, Moorfields, Clerkenwell, Islington, Stoke Newington and historic St Pancras (later mainly known as Camden Town).  The 1918 constituency corresponded to the smaller Metropolitan Borough of Finsbury (Finsbury, Moorfields, Clerkenwell, and St Luke's, Islington); it was a seat, thus electing a single member, fulfilling a longstanding aim of Chartism which underscored the 1832 reforms.