Southwark, to the south of the City on the other side of the Thames, was within the City between 1550 and 1899 as the Ward of Bridge Without, a situation connected with the Guildable Manor. The City's administrative responsibility there had in practice disappeared by the mid-Victorian period as various aspects of metropolitan government were extended into the neighbouring areas. Today it is part of the London Borough of Southwark. The Tower of London has always been outside the City and comes under the London Borough of Tower Hamlets.