Der Altuäter Leben., 15th century, Augsburg, Bavaria

Incunabula are books printed in the earliest years of the printing press, from the mid-15th century to the early 16th century. The term "incunabulum" is Latin for "cradle" and refers to the fact that these works were printed during the infancy of the printing industry. Incunabula are considered to be rare and valuable due to their historical significance and the fact that they were produced in relatively small numbers.