Late 14th century"The late 14th century mantle had multiple types of fastenings, one of which was a row of buttons. This type is depicted on a miniature from a Bible Historiale from 1372. Here the fastening is worn on the chest. An alternative for men was to wear the fastening on their right shoulder. This is depicted on the effigy of Johann von Holzhausen (+ 1393) and his wife Gudela Goltsteyn (+ 1371) in the Dom of Frankfurt am Main."
14th century (1320-1330) Hainaut or Valenciennes Bibliothèque nationale de France Français 571: (i.a.) Livre du Trésor by Brunetto Latini fol. 92r http://gallica.bnf.fr/ark:/12148/btv1b84510972/f1.planchecontact