plateresque
Concise Oxford English Dictionary © 2008 Oxford University Press:
plateresque /ˌplatəˈrɛsk/
▶adjective (especially of Spanish architecture) richly ornamented in a style suggesting silverware.
– origin C19: from Sp. plateresco, from platero ‘silversmith’, from plata ‘silver’.
'plateresque' also found in these Oxford entries:

