English: The third stained glass window symbolizes the period during which Vaud belonged to the Counts of Savoy, since the conquest of the country by the Count Pierre in the 13th century until 1536.

From top to bottom: - Coat of arms of the Counts of Savoy - Coat of arms of the Barony of Vaud; - Coat of arms of the four main cities of Vaud in the middle-ages: Moudon, Yverdon, Morges et Nyon - Coat of arms of Louis I, first Baron de Vaud has belonged to the Counts of Savoy, either since the conquest of the country by the Count

The border of the stained glass is adorned with the cost of arms of the Lords of Vaud: - Hugues de Palézieux, - Rodolphe et François de Billens, - Jean de Mont, - Rodolphe d'Oron, - Humbert et Guillaume de Colombier, - Henri et Claude de Menthon, - Humbert de Rovéréa, - Jean de Blonay, - de Dompierre, - Louis de Bière, - Louis de Joinville, - Aymon, François et Guillaume de La Sarra, - Humbert de Cerjat,

- Antoine d'Avenches.