This was named after Luke Gardiner, the first Viscount Mountjoy (Earls of Blessington) who developed the square, and who was the grandson of the Luke Gardiner who built Henrietta Street.
| Year | Architect | Building |
| 1830 | John Semple | St Mary's Church |
This was named after Luke Gardiner, the first Viscount Mountjoy (Earls of Blessington) who developed the square, and who was the grandson of the Luke Gardiner who built Henrietta Street.
| Year | Architect | Building |
| 1830 | John Semple | St Mary's Church |