Who did Perseus turn into stone?

Perseus turned Atlas into stone using the head of Medusa. According to mythology, Atlas was tasked with holding up the heavens and had once been a formidable giant. When Perseus encountered Atlas during his quest to slay Medusa, he asked for shelter. Atlas, however, remembered a prophecy that said he would be killed by a son of Zeus and refused to help Perseus. In retaliation, Perseus took out the head of Medusa, which could turn any creature that looked upon it to stone, and used it against Atlas. The result was that Atlas was transformed into stone, becoming the mountain range known as the Atlas Mountains in North Africa. This event firmly ties the mythological narrative of Perseus's adventures to the natural landscape, linking the hero's story to the geography of the region.

The other characters mentioned—Medusa, Cassiopeia, and Acrisius—are also significant in Greek mythology, but they do not relate to this particular event with Perseus turning someone into stone. Medusa is the creature that Perseus killed, Cassiopeia is a figure associated with vanity and was later punished by the gods, and Acrisius is Perseus's grandfather, who met his fate at the hands of