BUILDER Joe McNamara ordered to tear down Achill-henge structure by High Court.
The High Court ruled that the building, which is described as an ornamental garden, is in breach of planning laws.
Mr McNamara, from Salthill, Co Galway, who became known as the Achill avenger, came to prominence last year when he drove a cement lorry with the words 'toxic bank' and 'Anglo' up to the gates of Leinster House.
He was acquitted of charges of criminal damage and dangerous driving over the incident.
The enormous circular structure, located on commonage land above Pollagh, was erected at speed.
Mr McNamara refused to comment on the development. However, it is believed 'Achill-henge' was built to synchronise with the summer and winter solstices.