For more than 800 years, Trim Castle has sat on the south bank of the River Boyne in County Meath; a massive, brooding presence that dominates this quiet town. This is Ireland’s largest Norman castle, built by a legendary lord with a bad reputation and offering a fascinating glimpse into life in medieval Ireland. The castle It’s not hard to understand the message that Lord of Meath, Hugh de Lacy was sending with Trim Castle. It was a statement of power – a reminder to the native Irish that the Anglo-Normans invaders were here to stay. This massive, 20-sided cruciform tower – the walls are three metres thick in places – was a fortress. But it was also a home. Stand in the Great Hall and you can imagine lavish feasts and blazing fires. Climb the narrow spiral staircase to the chapel and you’ll be following in the footsteps of many pious castle inhabitants. And if you look out over the battlements atop the three-storied keep, you’ll see a view that would have looked familiar to any of Trim's medieval lords – the River Boyne flowing below and Trim’s lush commonage stretching out as far as the eye can see. The man behind Trim Castle Hugh de Lacy was a notorious womaniser, as famous for his loose morals as his fearsome facial scars. When de Lacy married the daughter of an Irish high king, Henry II of England immediately suspected his lord of trying to establish himself as an independent king of Ireland. Luckily for Henry, a disgruntled Irish nobleman lopped off Hugh’s head with an axe, saving the king the trouble of doing it himself. But royal concerns over the de Lacy family did not stop with Hugh’s death. Early in the 13th century, King John – he of Robin Hood fame – came to Ireland to subdue rebelling Norman lords and confront Hugh’s unruly son, Walter. Though King John eventually emerged victorious, he never breached the walls of Trim Castle and some say this is why it's known locally as King John’s Castle, a title intended to mock the English king for his failure. Cinematic views Arguably Trim Castle's most famous battle was a fictional one. Despite being set in Scotland, Mel Gibson’s Oscar-winning epic Braveheart was partly filmed in Ireland and Trim Castle played its part as the fortified English town of York, with the scenes set in London filmed inside the castle walls. Walking around the castle grounds and along the River Boyne, it’s easy to see why the filmmakers fell in love with the area. Inside the castle is just as impressive, with guided tours granting access to the keep, with its panoramic views of the surrounding countryside. Dive into history Ireland's Ancient EastWander through 5,000 years of history, where mythical heroes, tall tales and hidden histories collide. County Meath From heritage sites to horseracing on the beach, County Meath is a superstar of Ireland's Ancient East. Ireland's extraordinary castlesRomance, epic battles, haunted histories - find all this and more when you visit Ireland's dramatic castles.