Gandon's least well known building in Dublin is his Royal Military Infirmary of 1787 on Infirmary Road. He worked for the Wide Street Commissioners and designed the facades for the shops at ground floor of D'Olier Street, Burgh Quay and some surrounding streets. One of his most prestigious commissions, which came in 1785, was to extend Pearce's monumental Houses of Parliament, for which he built the (well known today) curved screen wall which links his new corinthian portico for the House of Lords facing College Street to Pearce's original building. This building is now the Bank of Ireland.