More than £82,000 is set to be spent on improving the main exhibition room at Plas Newydd in Llangollen.
The property, which was the home of Lady Eleanor Butler and Miss Sarah Ponsonby, holds unique historical significance and captured the imagination of Regency society.
The money is part of the Welsh Government's Cultural Transformation Capital Grant Programme, which aims to help organisations preserve collections for future generations and improve accessibility and sustainability.
The programme has provided more than £10.5 million in funding since it was launched in 2017.
The new Minister for Culture, Jack Sargeant, said: "Culture and heritage are crucial to Wales.
"From telling the important stories of our past to celebrating the Wales we live in today and the Cultural Transformation Programme is central in helping organisations do exactly that."
Other projects to receive funding include the Museum of Welsh Cricket, which was awarded more than £246,000 to support their project ‘Cricket has been, and still is, a game for everyone’.
The exhibition celebrates the culture and history of cricket, highlighting the contributions of women, LGBTQ+ people and Black, Asian, and Minority Ethnic communities.
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The money will be used to improve the care of collections, add new technology, and create public art murals.
Mark Frost, Glamorgan Cricket community and development manager, said: "We are very grateful to the Welsh Government for the grant for the museum and stadium at Glamorgan Cricket which will transform the look and feel of Sophia Gardens."
Other projects receiving funding include £300,000 for the refurbishment and modernisation of Cwmbran Library, and almost £300,000 heading to the Egypt Centre at Swansea University for the redevelopment of the House of Death ground floor gallery.
Awen Cultural Trust is receiving around £130,000 for the Betws Library Modernisation Project.
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