A Speakers' Corner is an area where free speech open-air public speaking, debate, and discussion are allowed. The original and best known is in the north-east 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. Hyde Park.
https://en.wikipedia.org/wiki/Speakers%27_Corner