It was most famous in the 20th century as the home of the Happy Gang,[3] a troupe of comics, singers and musicians including Danny Cummins, Jimmy Harvey, Mick Eustace and Cecil Nash.

During the War of Independence, popular[4] Queen's Theatre manager John Lawrence Christopher "Jack" Sullivan made headlines across Ireland when he was arrested by the military in the early hours of Thursday, 14 October 1920[5] on suspicion of Sinn Fein membership in the weeks leading up to Bloody Sunday.

[7] Upholstered chairs were ripped open, pictures dismantled, and doors were torn off two cabinets, and papers examined in a 'long thorough search'[8] of Sullivan's home, in the dark, as the gas meter was broken.

[7] Sullivan, and a 17-year-old student lodger named Mr Herriott from Nenagh at number 29, was arrested under the defence of the realm regulations by General Boyd[9] and taken to Ship St Barracks at Dublin Castle.

[8] A month later, six doors up, British Army Intelligence Officer Lieutenant Henry Angliss (cover name 'Patrick McMahon',) was shot by the IRA at 22 Lower Mount Street on Bloody Sunday.