Ackermann carved allegorical virtues for the Vigala altar together with his assistant. Ackermann carved several allegorical virtues for the Vigala altar together with his assistant: the statues of Faith with a cross and Hope with an anchor, Love (?) (which had lost its attribute) and the Church (?) with a chalice. Some allegorical virtues adopted from ancient philosophy – Clemency with a lamb and Fortitude with a column – on the reliefs adorning the retable’s columns were meant to supplement those four virtues in Vigala Church.