In Greek art and architecture, the period that immediately follows the Classical. Scholars do not all agree about which historical events mark the beginning and the end of the Hellenistic period. However, by convention, most accept the death of Alexander the Great in 323 BCE as the starting point and 31 BCE, the date of the Battle of Actium, as the end point. During the Hellenistic era Greek cultural influence reached its peak in the Mediterranean and beyond. The period saw a proliferation of new styles and subjects in the arts. Web resource here.
The Winged Victory of Samothrace. Parian marble. Ca. 190 BCE. Musée du Louvre, Paris. Photo: Steven Zucker.