The London Undone ‘City of London Churches’ podcast series: A journey around the magnificent and many churches of the City of London. Learn about their histories, architecture, associations, features and their spiritual lives today.35. This is the only Roman Catholic church in the square mile and it's easily mistaken for a shop! But do take a walk through its oft open doors for some peace and tranquility and tune in to this podcast where Fr Chris Vipers shares its history, features and a sense of its spirituality.