William Dargan MRDS was arguably the most important Irish engineer of the 19th century and certainly the most important figure in railway construction. Dargan designed and built Ireland's first railway line from Dublin to Dún Laoghaire in 1833. In total he constructed over 1,300 km of railway to important urban centres of Ireland. He was a member of the Royal Dublin Society (RDS) and also helped establish the National Gallery of Ireland. He was also responsible for the Great Dublin Exhibition held at Leinster lawn in 1853. His achievements were honoured in 1995, when the Dargan Railway Bridge in Belfast was opened, and again in 2004 when the Dargan Bridge, Dublin a new cable stayed bridge for Dublin's Light Railway Luas were both named after him.

The National Gallery of Ireland houses the national collection of Irish and European art. It is located in the centre of Dublin with one entrance on Merrion Square, beside Leinster House, and another on Clare Street. It was founded in 1854 and opened its doors ten years later. The gallery has an extensive, representative collection of Irish paintings and is also notable for its Italian Baroque and Dutch masters painting. The current director is Caroline Campbell.