Published Saturday, 07 July 2012
Crowds waved placards and chanted Lennox's name. (© UTV)
The demonstration outside City Hall on Saturday afternoon comes after it emerged that the animal is due to be put down at the start of next week.
It follows a long-running legal battle between the owners of Lennox and Belfast City Council, which has been drawn out over the two years since he was seized by council dog wardens - and has grabbed the attention of animal lovers around the world.
Campaigners said people have flown to Northern Ireland from the United States, England, Dublin and "many other locations" to take part in the peaceful rally.
It is understood a further protest will take place in New York City on Monday.
Celebrity experts like Cesar Millan and Victoria Stilwell have also shown their support for the 'Save Lennox' campaign.
However the family last week admitted defeat and said there is nothing more they can do from a legal point of view, and that the dog "may well be killed".
Last month, senior judges sitting in the Court of Appeal backed the verdict of a County Court judge who had made an earlier ruling that Lennox could not be made safe.
Lord Justice Paul Girvan, sitting with Lord Chief Justice Sir Declan Morgan and Lord Justice Malachy Higgins, set out how dog wardens trying to examine Lennox in May 2010 had been told that the dog would "rip their head off".
While an expert dog handler retained by Mrs Barnes described Lennox as a well-handled family dog, an expert for the City Council concluded that the animal had a severe personality defect.
Lennox's family have since been advised by their legal team that there are no grounds for any further appeal.
© UTV News