Berenice I was Queen of Egypt by marriage to Ptolemy I Soter. She became the second queen, after Eurydice, of the Ptolemaic dynasty of Egypt.

Ptolemy I Soter was a Macedonian Greek general, historian, and successor of Alexander the Great who went on to found the Ptolemaic Kingdom centered on Egypt and led by his progeny from 305 BC – 30 BC. Ptolemy was basileus and pharaoh of Ptolemaic Egypt from 305/304 BC to his death, during which time Egypt became a thriving bastion of Hellenistic civilization and Alexandria a great seat of Greek culture.