Northern Transept :The stained-glass window was assembled by Jean Haeck (master glass-worker from Antwerp) who made them in 1537 after drawings by the Brussels court painter Bernard Van Orley. It depicts Charles V and his wife Isabelle of Portugal kneeling in front of the Holy Sacrament. They are accompanied by their patron saints Charlemagne and Elisabeth of Hungary. To the right of the portal is an elegant and tender statue of “The education of the Virgin by St Anne” by Jérôme Duquesnoy the Younger (17th century) after a painting by Rubens.

South Transept :The stained-glass window is also the work of Jean Haeck (after a drawing by B. Van Orley) made in 1538. It shows Louis II of Hungary and his wife Maria of Hungary, sister of Charles V, kneeling in front of the Trinity, with St Louis and the Virgin with Child behind them.