This medieval Flemish tapestry is entitled L’Arithmétique and it is part of an anonymous series on the theme of the seven liberal arts. The composition is organized around a young woman standing behind a table. This woman is teaching some traders and bankers how to manage with the Arabic figures. The inscription says:
Monstrat ars numeri que virtus possit habere. / Explico per que sit proportio rerum.
I should look for the Geometry and the Astronomy to complete this allegorical series, don’t I?