“The event, usually held on 13 July, is a theatrical re-enactment of the victory of King William III over the Catholic King James II at the Battle of the Boyne in 1690.”
https://www.bbc.co.uk/news/uk-northern-ireland-58356074
Daily Walk Series’ – 28.8.2021 – (Royal Black Institution) “Last Saturday”, Belfast Parade (A.M.)
