In 1735 (possibly 1736) a 130 feet obelisk was raised 3 miles west of Drogheda, marking the site of the 1690 Battle of Boyne. It is currently in a state of disrepair but some Orangemen are keen to put that right I understand. The painting is from 1757 and is by Thomas Mitchell (Who was born in 1735!).
The inscription read
'Sacred to the glorious memory of King William the Third, who, on the 1st of July, 1690, passed the river near this place to attack James the Second at the head of a Popish army, advantageously posted on the south side of it, and did, on that day, by a single battle, secure to us and to our posterity, our liberty, laws, and religion. In consequence of this action, James the Second left this kingdom and fled to France.'