The Vow of Louis XIII is an 1824 oil painting on canvas by the French Neoclassical artist Jean-Auguste-Dominique Ingres, now in Montauban Cathedral.

[1][2] The subject of the painting was to be Louis XIII's vow[3] in 1638 to consecrate his kingdom to the Virgin in Her Assumption.

Although he had experienced success as a portrait painter, his ambition was to establish a reputation in the more prestigious genre of history painting.

He went to work with his usual diligence, and spent four years bringing the large canvas to completion.

In January 1825 he was awarded the Cross of the Légion d'honneur by Charles X,[5] and in June 1825 he was elected to the Institut de France.