The Dufferins also made extensive use of the Citadel of Quebec in Quebec City as a second vice-regal residence, having developed a strong attachment to the city and its significant historical ties with the British Empire. When Quebec city officials began to demolish the old city walls, Dufferin was appalled, persuading them to stop the demolition, and to repair and restore what had already been damaged (Old Quebec was eventually recognized by UNESCO as a World Heritage Site in 1985). Dufferin's final public appearance as Governor General was in Quebec City, to lay the foundation stone for Dufferin Terrace, an expansive walkway overlooking the St Lawrence River built to his own design and arguably his best-known legacy in Canada In 1876 he was appointed Knight Grand Cross of the Order of St Michael and St George (GCMG).