Even though it’s not as famous as oil paint, tempera paint was a very popular medium in the Italian Renaissance. Traditionally made by combining egg with pigment, tempera is a bit more forgiving than watercolor, but much more delicate than oils. For this reason, it has been the medium of chose for many artistic masters seeking to create a masterpiece. This article from Art Factory provides a great overview of Renaissance tempura works.
Article: Italian Renaissance Art: Tempera Painting
Humanities Scholars 