Northern Ireland murals
Northern Ireland contains arguably the most famous political murals. Almost 2,000 murals have been documented in Northern Ireland since the 1970s. Although the murals more often than not represent violence and intolerance, they are renowned for their professional nature and the incredible level of skill of the artists creating them.

Almost all of the Northern Ireland murals promote either republican or loyalist political beliefs, often glorifying paramilitary groups such as the Provisional Irish Republican Army and the Ulster Volunteer Force, while others commemorate people who have lost their lives in terrorist attacks. Many artists incorporate messages of religious intolerance into politically-driven murals.

The most famous of the murals in Northern Ireland may well be Free Derry Corner, where the slogan "You Are Now Entering Free Derry" was painted in 1969, shortly after the Battle of the Bogside. However, some do not consider Free Derry Corner to be a true mural as it is only words and not images. Free Derry Corner has been used as a model for other murals in Northern Ireland, including the "You Are Now Entering Loyalist Sandy Row "mural in Belfast, which was a response to the republican message of Free Derry Corner, and the "You Are Now Entering Derry Journal Country" mural, which is an advertisement for a Derry publication.

Not all murals in Northern Ireland are political or religious in nature, with some commemorating events such as the Great Famine and other moments in the history of Ireland. Many portray events from Irish mythology, though images from Irish myths are often incorporated into political murals. A few murals avoid the subject of Ireland altogether, instead focusing on such neutral subjects as litter prevention and the C.S. Lewis novel The Lion, the Witch, and the Wardrobe.

Murals representing peace and tolerance are becoming increasingly popular with school groups who have children either design or actually paint murals in areas around their schools.