|Location||Oldbridge, County Louth, Ireland|
|Height||53 m (174 ft)|
|Dedicated to||William of Orange|
|Dismantled date||31 May 1923|
The monument was erected in order to commemorate William of Orange's victory over the Jacobite forces of King James II at the Battle of the Boyne in 1690, and was located near the spot where William's forces crossed the River Boyne to engage James' forces. It was built in 1736, with the foundation stone being laid by Lionel Sackville, Lord Lieutenant of Ireland.
The Obelisk was made from granite and was built upon a large mound of granite located on the north bank of the River Boyne. At a height of 53 metres (174 ft) it was both the tallest man-made structure in Ireland and the tallest obelisk in Europe at the time of its construction. It initially stood adjacent to a wooden bridge spanning the river, which was later superseded by a lattice iron bridge that was built in 1869 and named the Obelisk Bridge, after the monument.
The square base of the Obelisk bore an inscription on each of its sides. The north side 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, 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 II left this Kingdom and fled to France. This memorial of our deliverance was erected in the 9th year of King George II, the first stone being laid by Lionel Sackville, Duke of Dorset, Lord Lieutenant of the Kingdom of Ireland, MDCCXXXVI
The south side inscription read:
The east side inscription read:
- In defence of Liberty, July 1st MDCLXXXX
The west side inscription read: