There were important changes under the first Habsburgs. Blanche of France, Duchess of Austria, the wife Rudolf III, left a chapel for her grandfather, Ludwig of France ("Heiliger Ludwig von Frankreich") on the northern side of the church, which was completed in 1328. It had a separate entrance and no connection to the nave. This was changed circa 1340, as the Ludwig chapel was combined with the two naves of the church forming a church hall with two choirs and three naves. Into the church therefore new columns were added and a new portal was constructed in the west.