The scale and grandeur of the property portfolio put together by Brian and Mary Patricia O'Donnell was remarkable, even during the boom.
The former family home at Gorse Hill in Killiney is one of the capital's most luxurious private houses.
Their period townhouse in Barton Street, London, comes with a swimming pool, a £13m (€16m) asking price and the Palace of Westminster for a neighbour. And the houses are the tip of the iceberg.
In 2005 they were the first private individuals to buy an entire building in London's Canary Wharf. They splashed out €207m on 15 Westferry Circus, and later bought a second block nearby for €185m.
They owned the Sanctuary Building, also in London, headquarters of the UK Secretary of State.
In Sweden it was Stockholm's Fatburen Building, which houses the country's tax authorities, and was bought for €285m.