Complex sentence: A second restoration process started around 1100 and came to an end in the 13th c. Virgin's blue mantle which is wrapped over her purple dress was severely altered in the outline; the red halos are also not part of the original image.
Split into simpler sentences: A second restoration process started around 1100 and came to an end in the 13th century. The Virgin's blue mantle which is wrapped over her purple dress was severely altered in the outline; the red halos are also not part of the original image.