Monsieur Jourdain is a character from the play "Le Bourgeois Gentilhomme," written by Molière in 1670. He is a wealthy middle-class man who aspires to rise in social status and become part of the aristocracy. Jourdain is often portrayed as foolish and naive, believing that money can buy him sophistication and refinement. Throughout the play, Jourdain engages in various activities to achieve his goals, such as taking lessons in music, dance, and philosophy. His attempts to impress the upper class often lead to humorous situations, highlighting the themes of social ambition and the absurdity of pretentiousness in society.