Mold Castle was probably built by Robert Monthault (temp. William Rufus), was taken and destroyed by Owen Gwynedd in 1144-1145, its site lost to the English and retaken by Llewelyn ap Iowerth in 1201, and by Gruffydd Llwyd in 1322.
The town possesses 103 acres of parks and open spaces, the chief being Llewelyn Park of 42 acres in the north of the town near Morriston, Victoria Park (16 acres) and recreation ground (8 acres) abutting on the sands in the west, with the privately owned football field between them, Cwmdonkin (13 acres) commanding a fine panoramic view of the bay, and Brynmill (9 acres) with a disused reservoir constructed in 1837 and now converted into an ornamental lake.
It was only the alliance of Montfort with Llewelyn of North Wales that brought the earl of Hereford back to his allegiance.
On Palm Sunday 1282, in a time of peace, David suddenly attacked and burnt Hawarden Castle, whereupon all Wales was up in arms. Edward, greatly angered and now bent on putting an end for ever to the independence of the Principality, hastened into Wales; but whilst the king was campaigning in Gwynedd, Prince Llewelyn himself was slain in an obscure skirmish on the 11th of December 1282 at Cefn-ybedd, near Builth on the Wye, whither he had gone to rouse the people of Brycheiniog.
Thus did a Welshman revenge the ignominious deaths of Prince Llewelyn and Prince David by becoming two centuries later king of England and prince of Wales.
In 1276 Edward entered Wales from Chester, and after a short campaign brought his obstinate vassal to submit to the ignominious treaty of Conway, whereby Llewelyn lost almost all the benefits conferred on him by the compact of Montgomery ten years before.
At first he was a friend of King John, whose illegitimate daughter, Joanna, he took to wife (1201); but the alliance soon fell through, and in 1211 John reduced Llewelyn to submission.
When Simon turned the native Welsh prince Llewelyn against the marcher barops, he gave great offence; he was accused of sacrificing Englishmen to a foreign enemy.
Meanwhile Aquitaine was gradually lost; the defeat of Pembroke off La Rochelle deprived England of the command of the sea, and Sir Owen ap Thomas, a grand-nephew of Llewelyn ab Gruffyd, planned, with French help, an abortive invasion of Wales.
Of Griffith's three sons, Owen, Llewelyn and David, the most popular and influential was undoubtedly Llewelyn, whose deeds and qualities were celebrated in extravagant terms by the bards of his own day, and whose evil fate has ever been a favourite theme of Welsh poets.