In 2007 when the Landmark Trust was first approached to take on Llwyn Celyn, a medieval farmstead built on a Welsh hillside in 1420, it was “in a perilous state of disrepair and on the brink of collapse”. But the derelict property was historically important in Welsh architecture as well as being a textbook example of the development of a manor house. So a massive restoration project began to take it back to how it looked in the more prosperous 17th century.