sentences:  In 1563 the garden was relocated from its original riverside location (now the Medicean Arsenal) to one near the convent of Santa Marta, and in 1591 (under Joseph Goedenhuyze) again moved to its third and current location.From these early times, the garden has contained a gallery of natural objects (now Pisa's Museo di Storia Naturale), a library (now part of the university library), and portraits of its directors throughout the centuries.It also includes one of the earliest iron-framed hothouses built in Italy.