The building which exists today has undergone many changes over the
centuries, with parts re-built to suit the style and needs of each
period. The original Hospital developed around the chapel of Saint
Gudwal which stood to the north of the present building.
This chapel was a substantial structure
as the remains of stone pillars from the building to be seen in
the garden suggest. The Hospital itself eventually
assumed a shape typical of this period, a H with the Great Hall
forming the crossing point between two wings, which still exist
Most of the building dates
from the late fifteenth century and is of timber framed construction.
Much of this timber frame would have been cut to size and fitted
together in the timber yard before being dismantled and re-erected
on site, making timber framed buildings amongst the first "pre-fabs".
So that each piece was put together in the right order, the timbers
were marked by the carpenters. These marks can be seen throughout
the building usually in the form of roman numerals. The spaces between
the beams were in-filled with wattle and daub. The wattle, a woven
construction of wood was covered by the daub, a plaster whose ingredients
could include mud, lime, cow dung, horse hair or straw.