William of Orange and his men may never march across this bridge but many thousands of motorists will soon be using it.
For in the past few days the River Boyne has been bridged by the largest cable-stayed bridge of its kind in the Republic.
It is 385 metres long and 34.5 metres wide and, once opened as part of the Gormanston to Monasterboice motorway, it will change forever the landscape of the Boyne Valley.
It will allow motorists travelling the M1/NI between Dublin. and Belfast to by-pass Drogheda.
Construction on the bridge began in May 2000 and, depending on the stage work is at on the roads either side of it, the motorway could be open to traffic by the end of the year.
The bridge is asymmetric and cable-stayed, which in layman's terms means there is a large concrete tower at one end and the cables which support the bridge are attached to it.
It will be 20 metres above the river and is the first cable-stayed bridge of its type in Ireland.
A number of smaller pedestrian bridges of this type have been built in the Republic, but none of them is on the scale of the Boyne Bridge.
The engineer overseeing its construction, Mr John Iliff, described the bridge design as visionary and said he believes it will influence the future design of bridges on the island of Ireland.
The northern section of the carriageway was constructed beside the northern river bank.
When its steel framework had been completed it was moved across the river, passing through the two concrete sides of the main tower until it met the opposite carriageway.
The girders on both sides were welded together in the past few days and, cross-belted into position, the bridge was born.
The motorway and bridge will be safer than the existing N1, which is notorious for serious and fatal accidents. Statistics have shown that motorways are the safest roads.
The bridge is part of a new stretch of the 21-km portion of highway which will link the existing Balbriggan and Dunleer bypasses and will form part of the main route between Dublin and Belfast.
Mr Iliff commented: "It is a visionary engineering statement because we have taken bridge engineering to a new stage in Ireland."
He added: "I would like to think the success of a project like this will put down a marker to designers, and clients will think that we can look beyond what are (currently) the accepted norms for construction techniques in this country."