What is Bonfire Night and where does the Cork tradition come from?

The "Togher 2018 Tractor" sculpture built by Dowtcha Puppets and local teenagers, after being set alight at the Cork City Council Bonfire Night family fun event at Clashduv Park, Togher, Cork. Picture: Michael O'Sullivan/OSM PHOTO
Bonfire Night or ‘Bonna Night’ takes place every June just after the summer solstice. While this is a very old tradition, Cork city continues to be one of the very few areas that still celebrates it.
But what is Bonfire Night and how did it all start? We take a look at its origin and how it has changed over the past number of years.