The Unburnt Bush is the blackthorn bush from which prophet Moses heard the voice of God. According to the legend, Moses was tending sheep in the desert near Sinai mountain and saw a bush that was covered in flames but not burnt. When he approached the bush he heard the Lord address him, calling to lead the people of Israel to the promised land. The Unburnt Bush in icon painting is one of the types of portraying the Theotokos. The Theotokos is portrayed here using the prototype from the Old Testament.
The Unburnt Bush in Christianity is the symbol of the Immaculate Conception of Jesus. Therefore, the Theotokos was most often portrayed on icons of this type as Our Lady of the Incarnation with her hands raised to the skies and the divine child at hear chest.

The author made explanatory notes on the margins for each of them. For instance, he wrote next to the scene of the vision to prophet Moses of Theotokos in the flaming bush: “Moses saw a bush on the mountain, flaming and not burning”.