As warden ("kerkmeester") of St. John's, Vijd between 1410 and 1420 not only financed the construction of the principal chapel's bay, but endowed a new chapel off the choir, which took his family name and was regularly to hold masses in his and his ancestors' memory. It was for this new chapel that he commissioned Hubert van Eyck to create an unusually large and complex polyptych altarpiece. He was recorded as donor on an inscription on the original, now lost, frame. The chapel was dedicated to St. John the Baptist, whose traditional attribute is the Lamb of God, a symbol of Christ.