Mulholland was appointed the curator for the Northern Irish Pavilion at the 2005 Venice Biennale by the British Council Northern Ireland and the Arts Council of Northern Ireland.
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During his tenure at the gallery he curated major exhibitions by prominent International artists including, Barbara Freeman, Jack Pakenham, Yoko Ono, David Byrne, Hans Peter Kuhn, Stan Douglas, Willie Doherty, Victor Sloan and Alistair MacLennan.
Hugh Masekela | Hugh Jackman | Hugh Grant | Hugh Laurie | Hugh Hefner | Hugh | Hugh O'Brian | Hugh Grosvenor, 2nd Duke of Westminster | Mulholland Drive (film) | Mulholland Drive | Hugh Percy, 2nd Duke of Northumberland | Hugh Percy, 1st Duke of Northumberland | Hugh Martin | Hugh Dennis | Hugh Walpole | Hugh O'Neill, Earl of Tyrone | Hugh de Lacy | St Hugh's College, Oxford | Hugh Wheeler | Hugh Trenchard, 1st Viscount Trenchard | Hugh Trenchard | Hugh Pughe Lloyd | Hugh MacDiarmid | Hugh Lloyd | Hugh Greene | Hugh Carey | Hugh Wolff | Hugh Trevor-Roper | Hugh Shelton | Hugh Price Hughes |