The General Post Office or GPO in O'Connell Street is one of the top ten sights of Dublin. Not only does the massive classical building dominate Dublin's main thoroughfare, it also is the iconic symbol of the failed 1916 Easter Rising. Here the short-lived Irish Republic was proclaimed by Patrick Pearse ... a few days later only some smoldering ruins were left. Several renovations restored the GPO to its former glory, making it a must-see in Ireland's capital.