Medieval heraldic conical chasubles

The New Liturgical Movement has recently had two photographs of surviving medieval conical chasubles, both handsomely decorated with royal heraldry. There is this spectacular example from Spain:

Chasuble of the Archbishop of Toledo,

 Don Sancho de Aragón (1264-1275)

and from fourteenth century France there is this example from the church at Brienon:

It is decorated with the arms of  Blanche de Navarre Queen of France (c. 1333 - 1398) also known as Blanche d'Evreux, daughter of Philippe of Evreux, King of Navarre who became the second wife of King Philippe VI (1293 - 1350):

The arms are: Party per pale: 1. France. 2. Party per fess: a. Navarre. b. Evreux.

I posted about Queen Blanche in my post The library of a fourteenth century Queen of France in September last year.

Fr Blake has some observations about this form of the vestment in his post Conical Chasubles.