Speakers' Corner

A Speakers' Corner is an area where open-air public speaking, debate, and discussion are allowed. The original and best known is in the northeast corner of Hyde Park in London, England. Historically there were a number of other areas designated as Speakers' Corners in other parks in London, such as Lincoln's Inn Fields, Finsbury Park, Clapham Common, Kennington Park, and Victoria Park. Areas for Speakers' Corners have been established in other countries and elsewhere in the UK.

Speakers here may talk on any subject, as long as the police consider their speeches lawful, although this right is not restricted to Speakers' Corner only. Contrary to popular belief, there is no immunity from the law, nor are any subjects proscribed, but in practice the police intervene only when they receive a complaint. On some occasions in the past, they have intervened on grounds of profanity.

Wikipedia