The Bard of Barnsley Ian McMillan was among the invited guests at Square Chapel for the fundraising launch of its Cornersatone project.
A poem specially written during the event was auctioned off, while Halifax musicians Galina and Scott, from Square Chapel, also performed.
The arts organisation has already raised £5.1m through the Arts Council and private investment, but needs another £900,000 to reach its £6m target.
Mr McMillan said: “I’ve been to Square Chapel twice before and I think it’s fantastic that it’s got this investment, especially in such times of austerity.
“I think this can become a cultural hub and hopefully be the start of something really great where people can come and be creative and express themselves.”
Sally Martin, director of Square Chapel, said: “The effort that has gone in has been amazing and it will be a fantastic resource for people to see enjoy some performing arts, cinema and a wonderful cafe bar.
“Without the people of Halifax supporting it, it wouldn’t exist. We’re almost there but we need people to help us with the final step.”