The National Leprechaun Museum was established in March 2009 by Tom O’Rahilly at Twilfit House, Jervis Street,Dublin (www.leprechaunmuseum.ie). It is the world’s first Leprechaun Museum and is housed in the ground floor of a former factory in central Dublin. The existing northern facade of the building presents a blank frontage to a major public open space in Dublin, Wolfe Tone Square. The proposed cafe will animate this blank facade and provide the museum with a highly visible public interface.The leprechaun was a mythological figure in Irish folklore who could lead one to treasure buried at the end of a rainbow. The proposed cafe design interprets this in a modern way forming a canopy lit by fibre optic cable cycling through the colours of the rainbow.