Among his commissions for monumental decorative programs, Rubens designed four cycles of tapestries: two historical (the Decius Mus and Constantine series), one religious (the Triumph of the Eucharist), and one mythological (the Life of Achilles). The third in this chronological sequence, the Eucharist Cycle (1625–27), represents not only Rubens's largest tapestry commission but also his largest surviving and most complex program of church decoration.1