Signa Holding's insolvency on Wednesday has cast a spotlight on the complex structure of the debt-ridden Austrian property empire, whose holdings span from New York's Chrysler building to shares in Britain's Selfridges department store. Although some parts of the empire are battling to stay afloat, the move is likely to trigger a domino effect across its vast retail and real-estate portfolio built up over two decades. Here is a breakdown of the key parts of the business: SIGNA HOLDING The holding company of Rene Benko, 46, the Tirolian property magnate behind the empire, is active in real estate and retail and invests in other companies.