'The City' is the original Londinium, founded by the Romans, and the powerhouse of the empire Britain built up in imitation. Full of historic churches and buildings and tiny mediaeval alleyways it's often overlooked by tourists who just visit St Paul's and the Tower of London, to their cost, for it's really worth discovering the rest of the 'square mile'. We've a large section on the City in this guide, and several itineraries for walks - to discover the hidden treasures like the ancient guildhalls and the best preserved ancient churches in London. See 'The City' section for more details.
Transport: Bank or St Paul's tube stations on the Central line, or Monument on the Circle Line.