Lastheneia of Mantinea was one of Plato

Plato

Plato , was a Classical Greek philosopher, mathematician, student of Socrates, writer of philosophical dialogues, and founder of the Academy in Athens, the first institution of higher learning in the Western world. Along with his mentor, Socrates, and his student, Aristotle, Plato helped to lay the...

's female students.

She was born in Mantinea, an ancient city in Arcadia

Arcadia

Arcadia is one of the regional units of Greece. It is part of the administrative region of Peloponnese. It is situated in the central and eastern part of the Peloponnese peninsula. It takes its name from the mythological character Arcas. In Greek mythology, it was the home of the god Pan...

, in the Peloponnese

Peloponnese

The Peloponnese, Peloponnesos or Peloponnesus , is a large peninsula , located in a region of southern Greece, forming the part of the country south of the Gulf of Corinth...

. She studied in the Academy

Platonic Academy

The Academy was founded by Plato in ca. 387 BC in Athens. Aristotle studied there for twenty years before founding his own school, the Lyceum. The Academy persisted throughout the Hellenistic period as a skeptical school, until coming to an end after the death of Philo of Larissa in 83 BC...

 of Plato dressed as a man. After the death of Plato she continued her studies with Speusippus

Speusippus

Speusippus was an ancient Greek philosopher. Speusippus was Plato's nephew by his sister Potone. After Plato's death, Speusippus inherited the Academy and remained its head for the next eight years. However, following a stroke, he passed the chair to Xenocrates. Although the successor to Plato...

, Plato's nephew. She is also said to have had a relationship with Speusippus.

A papyrus

Papyrus

Papyrus is a thick paper-like material produced from the pith of the papyrus plant, Cyperus papyrus, a wetland sedge that was once abundant in the Nile Delta of Egypt....

 fragment from Oxyrhynchus

Oxyrhynchus

Oxyrhynchus is a city in Upper Egypt, located about 160 km south-southwest of Cairo, in the governorate of Al Minya. It is also an archaeological site, considered one of the most important ever discovered...

 mentions an unidentified woman who studied under Plato, Speusippus, and then Menedemus of Eretria. The fragment goes on to explain that "in her teens she was lovely and full of unstudied grace." This woman is probably Lastheneia or Axiothea of Phlius

Axiothea of Phlius

Axiothea of Phlius was one of Plato's female students.She was born in Phlius, an ancient city in the Peloponnese which was under Spartan rule, when Plato founded his Academy. Axiothea is said by Themistius to have read Plato's Republic and then travelled to Athens to be his student. She studied in...

.