I passed these earlier on today and was fortunate to be carrying a camera. The gate hinges of the National Concert Hall are truly fantastic, massive cast iron hands that grab your attention as you pass. A fantastic description of the Earlsfort Terrace gates comes from Alfred G. Jones, architect for the Dublin Exhibition of 1865, who noted that:
The principal entrance to the building is from Earlsfort-terrace, through six pairs of gates which form a portion of the enclosure wall and chain railing; this runs the entire length of Earlsfort-terrace, for a distance of 250 feet along Hatch-street. Each of the gate entrances has four piers of granite, circular on plan, 3 feet 3 inches at base, 8 feet 6 inches high, and surmounted with a cast-iron lamp-post 7 feet high. The iron gates are 15 feet wide, and 6 feet high, hung to massive cast iron hands, which are leaded into the stone piers.
The source of Jones’ comments is the old reliable Archiseek, who have a great article on the 1865 Dublin exhibition available to read here.