"Nano (dwarf as in nanism) " (see related A), 1564 Valerio Cioli (1529 - 1599) Palazzo Pitti, Florence, Tuscany, Italy

In my opinion, this sculptor did not faithfully represent the peculiarities of this short stature person - but nonetheless, the prominent forehead and relatively large calvarium concurrent with a retro-flexed (hyperextended) right knee (genu-recurvatum), suggestive of laxity of articular tissues. The nose is not small nor short, but that maybe a flow of the artist. On balance, the most likely diagnosis is a connective tissue disorder known as achondroplasia.