History :
Dedicated to the Sainte-Croix, to Saint Louis and to Saint Thomas, this chapel is the unique remain of the Riomois Palace of the Duke Jean De Burry, son of the King Jean II the Good.
Work of the Architects Guy and Andre De Dammartin, its construction begun toward 1380, but not finished in time for the remarriage of the Duke in 1389. A century later, Pierre II De Bourbon established on it a canon chapter.
While directly inspired by the Ste-Chapelle of Paris, the project manager delivered a very personal version. Its plan is very simple: a unique nave and three equal bays followed by a chorus formed of a fourth bay and an apse of tree sections. The third bay flanked of two chapels constituting a transept.
If the keystones are richly carved, the moulding is the single decoration of the imbedded columns on which the intersecting ribs rest a spiral staircase serves two small rooms having day on the interior of the vault. That the top was the ducal oratory. The high covered slate roofs are bordered of an openwork stone balustrade where cinquefoils alternate with florets and some 73 m pinnacles long, the gallery of circulation is bordered of a much excavated plank stopped by many waste-gas mains. Posterior with construction, the stained glasses were carried out on the orders of the house of Bourbon. Damaged on several occasions, especially by hail, they underwent many restorations in 1686, 1727 and at the beginning of the XIXth century. In 1842, the painter and glassmaker Clermontois Thévenot made a choice among the best remains and juxtaposed them without rigorous order in the three rubble fillings of the bedside. On the walls of the bottom, one sees great tapestries of Aubusson to the flowers of lily on blue bottom by Beaufinet, of Restoration time.