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Why was Ptolemy I called Soter or Savior?
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Ptolemaic dynasty
Head of a queen, marble sculpture possibly made in Egypt, Ptolemaic period (305β30 bce); in the Brooklyn Museum, New York. 14 Γ 12 Γ 11.5 cm.
Ptolemy I was given the title Soter, which means "Savior," in 304 BCE after he provided military aid to the inhabitants of Rhodes during their conflict against Antigonus I Monophthalmus. Following this assistance, the people of Rhodes bestowed the divine title upon him, and he was commonly referred to by this name from that time forward.12