With a seating capacity of 383, the theatre provides a range of programming including drama, comedy, music, pantomime, and family shows as well as workshops and classes.

The theatre was named after Grianán of Aileach (‘Stony House of the Sun’), a prehistoric ring fort located in Burt believed to date back to 1700 BCE.

[2][3] The North West Theatre Project launched a major fundraising campaign in March 1997.

The Letterkenny Trad Week, which took place in January 2015, featured a number of artists such as Maura O’Connell and Karan Casey, Paddy Glackin and John Doyle.

[12] Scottish singer Isla Grant made a return to Ireland in February 2015 with her tour, playing in An Grianán on the 10th.

There are full facilities for people with disabilities including designated seating in the auditorium, a lift and specially adapted WC.

Some recent ones include: “Ephemera an exhibition by Robert Clarke” (September 2014),[16] “Fairytale Fantasies with Samantha Robinson” (October 2014) [17] and “serene by Katriona Dempsey and Valerie Würmli” (February/March 2015).

[18] 13 March saw the official opening of the Names Will Never Hurt Me exhibition put together by members of the LOFT LK.

Some past LYT shows include Alien Nation (2008), La Vide de Picasso (2009), and The Taming of the Shrew (2010).

On 22 August 2010, LYT entertained crowds at a festival in the Glebe Gallery by performing various different monologues.