The Custom House dome deserves a close up. Above the pediment are statues of Neptune, Mercury, Industry and Plenty. Between the Corinthian columns are arched and rounded windows and above them are four clocks. Standing on the top of the green copper dome is a 16 foot sculpture of Commerce. In 1921, the dome melted during an intense fire set by the IRA that engulfed the Custom House. Ardbraccan limestone was used for the reconstruction. This gives it a brownish hue in contrast to the rest of the white façade.