 He commissioned the architect Edward Haycock Snr in the early 1830s to build the present entrance hall and adjacent large room on the north side of the house.In 1881 Frank Ash Yeo, Chairman of the Swansea Harbour Trust, added the dining room to the east of Dillwyn’s entrance hall.Richard Glynn Vivian, an art lover from the Vivian family who gave the Glynn Vivian Art Gallery to Swansea, bought the Hall in 1898 as his home.