Rowland made significant investments to refurbish and renovate the estate. He played a prominent role in the Conservative Party's politics, climbing from the position of MP to Chief Whip. The house played an important role in supporting in his career, playing host to political rallies and entertaining high-profile guests. In 1885, he was bestowed with the title of the 1st Baron St Oswald, named in honour of the saint to whom the original Nostell Priory was dedicated.
In 1953, the house was given to the National Trust with the provision that the family maintained their stewardship. The 5th Baron and Baroness St Oswald played a vital role in the revival and restoration of the magnificent estate, ensuring it would be appreciated by future generations.
They forged a magnificent partnership with the National Trust, breathing new life into the old house, and immersing themselves in several renovation projects that have left a profound impact on the estate.
Their dedication towards Nostell and its historical significance to the region was evident in their commitment to preserving the cultural heritage. The stunning grounds and structures of the Nostell estate stand as a testament to Lady St. Oswald's unwavering dedication and tireless efforts.
Although Nostell is still the home of Charles Rowland Andres Winn, 6th Baron St Oswald, The Dowager retired to a fine Georgian home in Ludlow in later life, saying:
‘I was born in a Georgian house, always lived in them, and have retired to one. I love them’
Among the most prized exhibits at Nostell are an exceptional collection of Thomas Chippendale furniture and textiles, historical paintings, a Georgian dolls' house, Robert Adam interiors, and a rare clock by John Harrison.