Work on the restoration of an Edwardian cinema can begin after a £200,000 grant.
English Heritage has pledged the cash towards a major revamp of the Dome in Worthing.
It ends months of unease about the project's future.
Belle Stennett, managing director of the Dome, said the grant would unlock £1.65 million already set aside by the Heritage Lottery Fund.
She said she was delighted with the windfall, which will enable work to start on the restoration next month.
The Dome will shut in January for one year.
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