Dublin can be proud of its iron heritage, ranging from cast iron and wrought iron building structures, bridges, railway stations, railings & gates, street lamp-posts, pillar letterboxes, band-stands, fountains, glasshouses, and the humble manhole cover. The 19th century was the heyday of iron foundries, and the 20th century to a lesser extent, but such skilled industries are now lost, although leaving behind many mementos.