As the Herschel Museum occupies a fully restored 18th century townhouse, space is limited. The decision was thus made to commission a purpose-built exhibition gallery that would combine the best in modern design with a real sympathy for the existing historic building. Designed by Bath architects Hetreed Ross, the award-winning Caroline Lucretia Gallery for temporary exhibitions was opened in 2011. The Gallery was named in honour of Caroline Herschel, who lived at 19 New King Street (the home of the Herschel Museum of Astronomy) with her brother William. Caroline was an outstanding astronomer in her own right, renowned for her work on comets.
Funding for the Gallery was generously awarded by the Garfield Weston Foundation, the Golsoncott Foundation, The Charlotte Bonham-Carter Charitable Trust, Coutts & Co Charitable Trust, Bath & North East Somerset Heritage Services, The Thomas Sivewright Catto Charitable Trust, The Stephen Clark Charitable Trust, The William Herschel Society, Mrs Prudence Shorland, and the Bancroft Clark Charitable Trust, plus other donors who wish to remain anonymous.