Note: I am not a professional fashion historian. If you spot any inconsistency or outright fallacy somewhere in the picture descriptions please feel free (or even better, obliged) to let me know!
later 15th century (1479) Southern Netherlands - Bruges
British Library
Royal MS 17 F II: La Grande histoire César (Les faits des Romains, with additional texts)
fol. 308v - escape of Arsinoe
15th century (1479) Germany - Konstanz
Wien, Österreichische Nationalbibliothek
cod. 3049
fol. 169v
http://tethys.imareal.oeaw.ac.at/realonline/
no. 006766
15th century (ca. 1470-1472) Southern Netherlands - Bruges
London, British Library
Harley 4380: Chroniques (Vol. IV, part 2) by Jean Froissart
fol. 177r - “Richard II riding to the Castle of Flint”
http://www.bl.uk/catalogues/illuminatedmanuscripts/record.asp?MSID=7232&CollID=8&NStart=4380
The king seems to be wearing high riding boots. The fashionable gown with slit sleeves is worn atop a fitted doublet that is padded substantially at the shoulders. The collar of the doublet is visible at the neckline. Note the back v-neckline of the gown on the man in red on the extreme right.
15th century (1450-1480) Flemish
Genève, Bibliothèque de Genève
Ms. fr. 64: La fleur des histoires by Jean Mansel
fol. 48v - Ark of the Covenant??
The gown of the kneeling woman seems to be a variation on houppelande, with the collar turned down. Elements specific for the style and visible here are for example the full front, pleated when constricted by a customary wide belt (here obscured by the wearer’s hands) and the voluminous sleeves, in various styles, but generally in stark contrast with the tight, sleek sleeves of the later Burgundian v-neck gown.