ders or corner plates, the hingesbeing comparatively insignificant. The earliest type of nail-head ornament appears to have beenthat of a hemisphere, with the nail passing through the centie,and thus, driven through the door, holding the convex plate fast.These hemispheres themselves would be… … DOOR-KNOCKER, SPANISH, EARLY17TH CENTURY
Art · Decoration and ornament
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Illustrated catalogue of the extraordinary collection of art treasures and antiquities acquired during the past year by Professore Commendatore Elia Volpi ... to be sold at unrestricted public sale at the American Art Galleries [on Monday, Tuesday and Wednesday afternoon, Dec. 17th, 18th and 19th, 1917] (1917)](https://img.insideoutlibrary.com/img/200/ia-illustratedcatal00volp-219-171.webp)
