Sir Richard Clough (c. 1530–1570), known by his Welsh contemporaries as Rhisiart Clwch, was a merchant from Denbigh, north-east Wales, and an agent of Queen Elizabeth I of England.
Before his early death, Clough played an important role in its development, providing finance and appointing Hendrik van Passe, the Flemish architect, to work on the building.
He died unexpectedly in Hamburg, some time between March and July 1570, while preparing to bring his second wife, Katheryn of Berain, home to the new house he had built for her at Plas Clough on the outskirts of Denbigh.
Bach-y-Graig has been identified as possibly derivative of Soulton Hall, the architectural project of Sir Rowland Hill, an associate of the Greshams who published the Geneva Bible.
Bach-y-Graig appears to have served as a lodge-cum-office, with large associated warehouse ranges set around a courtyard, the while the more traditional Plas Clough was clearly intended from the outset as his main house.
[7][8] On the evidence of the similarities of these houses with the Renaissance buildings Antwerp and also the Royal Exchange in London, a strong case has been made out that their design should be attributed to the Flemish architect Henrick van Passe.
Peter Smith maps the distribution of houses with stepped gables which are concentrated around Denbigh and Ruthin, Conwy, the Menai Straits and the southern part of Merionethshire.