In 1726, long after the two original spinets were built, but still in Cristofori's lifetime, the Bolognese builder Giuseppe Maria Goccini (1675-post 1733) built an instrument on similar principles, with the longest strings in the middle, alternating key lengths, and the ability to change stops by sliding the keyboard. However, Goccini's instrument was octagonal (a rectangle with truncated corners) rather than rectangular with appended arches. It is not known whether this instrument was inspired by Cristofori's or was an independent invention.