Australian-born artist Ron Mueck's 'Dead Dad' (front) and Damien Hirst's 'The Physical Impossibility of Death in the Mind', portraying a shark within glass, steel, silicone and formaldehyde, are seen on display at the new Saatchi Gallery in London on Monday. Mil-lionaire Charles Saatchi's new BritArt gallery, which hopes to attract up to 750,000 visitors a year, is housed on the banks of the River Thames in the ornate and cavernous rooms of County Hall, the seat of London's government from 1912 to 1987. The reclusive Saatchi, 59, has over the past two decades amassed a collection of more than 2,000 pieces and almost single-handedly made the reputations of British artists Damien Hirst and Tracy Emin.