Cherie Blair has launched an appeal to raise £10 million for Liverpool's Anglican Cathedral - Giles Gilbert Scott's Gothic masterpiece.
On Tuesday, politicians and business leaders attended a fund-raising event, arranged by the prime minister's wife, at the Lincoln's Inn law centre in London.
The Grade I-listed building needs more than £4 million for repair work, including a major roof refurbishment and an overhaul of the 100m tower.
Funds are also needed to build a new visitor centre, complete with a theatre and widescreen film facilities for visitors.
This year the cathedral celebrates its centenary and has recently opened a new education centre, costing more than £2 million.
The running costs of the cathedral are thought to total £1.5 million a year.