Maʻaśeh Ṭoviyah, a Hebrew encyclopedia, is one of the first Hebrew books to have scientific and medical illustrations. Its frontispiece shows a portrait of the author, Ṭoviyah Kats (ca. 1652–1729), surrounded by books and wearing a doctor’s ring, a fur lined cape, and a hat. He holds a book in one hand, and an astroglobe in the other—symbolizing his quest to learn the natural order of the universe. The encyclopedia has eight sections—theology, astronomy, medicine, hygiene, illnesses from syphilis, botany, the universe, and the four elements—but most of it is devoted to medicine. One notable engraving quaintly compares the interior of a human body with that of a four-story house.