Kostroma is a Russian earth Goddess; She can be described as both a maiden and an old witch. She is said to sleep beneath a birch tree over the winter to awaken in spring.
I've put Her here in a birch forest as She awakens in spring; it is winter on the left and spring on the right, and the Sun of the vernal equinox shines overhead as one becomes the other. The style is after traditional Russian embroideries. Acrylic on canvas board, done as the Goddess of the Month over on my Patreon.