Abstract
The general view is that there is one type of nocturnal, which is universal, first illustrated in a printed book in 1524. Recently, a number of quite differently constructed nocturnals has come to light. Six of these were made at the very beginning of the sixteenth century by Falcono of Bergamo in northern Italy. One of them, with the initials of the inventor, may well be the prototype. Five more are closely similar. Five further nocturnals of the same type have been identified, but they are unsigned, and are not by Falcono. This paper establishes the existence of a hitherto unrecognized Italian workshop, and of a variant type of nocturnal