The emerald isle has been a regular and memorable point of reference for writers of The Simpsons throughout the show's history
Liam Neeson
The Ballymena actor guest starred in an episode in 2005 called The Father, the Son, and the Holy Guest Star.
Neeson plays an Irish priest who converts Bart and Homer to Catholicism.
Homer exclaims: "Catholics Rule! We've got Boston, south America and the good part of Ireland!"
In the same episode, Protestant heaven is full of posh polo players. Catholic heaven features an Irish bar filled with drunks fighting, all with green halos.
IRA
In Sex, Pies and Idiot Scrapes, first aired in 2008, Mayor Quimby declares that St Patrick's Day will be "booze free".
The announcement prompts Bart to ask: "Where are the IRA when you need them?"
As soon as the St Patrick's Day parade begins, Lisa says: "Oh no, the Northern Irish are also having a parade," as a group of orange-coloured men walk down the street holding Pride of Ulster placards.
Confused, Bart replies: "There are two kinds of Irish people? What are they fighting over - who gets to sleep in the bathtub?"
Marge says: "This was such a pleasant St Patrick's Day until the Irish turned up."
In the Name of the Grandfather
The episode was broadcast in Ireland on St Patrick's Day in 2009 - the first time an episode premiered outside of the US. Despite The Simpsons' many references to Ireland over the years, it was also the first time an episode was set in Ireland.
The plot involves Homer and Grampa becoming the owners of O'Flanagan's pub after buying it during a night of binge drinking. Marge, Bart and Lisa visit landmarks including the Giant's Causeway, Blarney Castle and the Guinness Brewery.
Actor Colm Meaney guest starred as Tom O'Flanagan, while singers Glen Hansard and Marketa Irglova reprised their roles from the film Once.
Whacking Day
The 1993 episode, one of the earlier references to Ireland, was based around the idea of driving snakes out of Springfield by beating them with clubs.
Bart later finds out that the day was actually invented in 1924 "as an excuse to beat up the Irish".
An Irishman then responds: "Ah, but 'twas all in good fun."