Diodotus III Plato (Greek: Πλάτων; Platon "broad-shouldered") was a Greco-Bactrian king, also known simply by the regnal name Diodotus III, who for a short time ruled in southern Bactria during the mid 2nd century BCE. The style of Plato's coins suggests that he was a relative most likely a son of Eucratides the Great, whose rise to power is dated to around 170–165 BCE.

Some of Plato's coins have inscriptions which may possibly be interpreted as dates using the Indo-Greek era which started around 186 BCE. In that case Plato ruled around 140 BCE. This matches the dating given by numismatician Bopearachchi, who places Plato between 145–140 BCE, since his coins are not found in the ruins of Ai Khanoum, a Bactrian city which was destroyed during the reign of Eucratides.

References

"The Shape of Ancient Thought. Comparative studies in Greek and Indian Philosophies" by Thomas McEvilley (Allworth Press and the School of Visual Arts, 2002) ISBN 1-58115-203-5
"Buddhism in Central Asia" by B. N. Puri (Motilal Banarsidass Pub, January 1, 2000) ISBN 81-208-0372-8

Preceded by:
Eucratides I?

Greco-Bactrian Ruler
(Bactria or its tributaries)

Succeeded by:
Eucratides II?

Greco-Bactrian and Indo-Greek kings, territories and chronology

Based on Bopearachchi (1991)^{[t 1]}

Territories/ dates	West Bactria	East Bactria	Paropamisade	Arachosia	Gandhara	Western Punjab	Eastern Punjab	Mathura^{[t 2]}
	Greco-Bactrian kings		Indo-Greek kings
326-325 BCE	Campaigns of Alexander the Great in India						Nanda Empire
312 BCE	Creation of the Seleucid Empire						Creation of the Maurya Empire
305 BCE	Seleucid Empire after Mauryan war		Maurya Empire
280 BCE	Foundation of Ai-Khanoum
255–239 BCE	Independence of the Greco-Bactrian kingdom Diodotus I		Emperor Ashoka (268-232 BCE)
239–223 BCE	Diodotus II
230–200 BCE	Euthydemus I
200–190 BCE	Demetrius I				Sunga Empire
190-185 BCE	Euthydemus II
190–180 BCE	Agathocles			Pantaleon
185–170 BCE	Antimachus I
180–160 BCE			Apollodotus I
175–170 BCE	Demetrius II
160–155 BCE			Antimachus II
170–145 BCE	Eucratides I
155–130 BCE	Yuezhi occupation, loss of Ai-Khanoum	Eucratides II Plato Heliocles I	Menander I
130–120 BCE	Yuezhi occupation		Zoilus I		Agathoclea			Yavanarajya inscription
120–110 BCE			Lysias		Strato I
110–100 BCE			Antialcidas		Heliocles II
100 BCE			Polyxenus		Demetrius III
100–95 BCE			Philoxenus
95–90 BCE			Diomedes	Amyntas		Epander
90 BCE			Theophilus	Peucolaus		Thraso
90–85 BCE			Nicias	Menander II		Artemidorus
90–70 BCE			Hermaeus	Archebius
			Yuezhi occupation		Maues (Indo-Scythian)
75–70 BCE				Vonones	Telephus	Apollodotus II
65–55 BCE				Spalirises		Hippostratus	Dionysius
55–35 BCE					Azes I (Indo-Scythians)		Zoilus II
55–35 BCE					Vijayamitra/ Azilises		Apollophanes
25 BCE – 10 CE				Gondophares	Zeionises	Kharahostes	Strato II Strato III
				Gondophares (Indo-Parthian)			Rajuvula (Indo-Scythian)
			Kujula Kadphises (Kushan Empire)				Bhadayasa (Indo-Scythian)	Sodasa (Indo-Scythian)
^ O. Bopearachchi, "Monnaies gréco-bactriennes et indo-grecques, Catalogue raisonné", Bibliothèque Nationale, Paris, 1991, p.453 ^ Quintanilla, Sonya Rhie (2 April 2019). "History of Early Stone Sculpture at Mathura: Ca. 150 BCE - 100 CE". BRILL – via Google Books.

v t e Hellenistic rulers
Argeads	Philip II Alexander III the Great Philip III Arrhidaeus Alexander IV
Antipatrids	Cassander Philip IV Alexander V Antipater II Antipater Etesias Sosthenes
Antigonids	Antigonus I Monophthalmus Demetrius I Poliorcetes Antigonus II Gonatas Demetrius II Aetolicus Antigonus III Doson Philip V Perseus Philip VI (pretender)
Ptolemies	Ptolemy I Soter Ptolemy Keraunos Ptolemy II Philadelphus Ptolemy III Euergetes Ptolemy IV Philopator Ptolemy V Epiphanes Cleopatra I Syra (regent) Ptolemy VI Philometor Ptolemy VII Neos Philopator Cleopatra II Philometor Soter Ptolemy VIII Physcon Cleopatra III Ptolemy IX Lathyros Ptolemy X Alexander Berenice III Ptolemy XI Alexander Ptolemy XII Auletes Cleopatra VI Tryphaena Berenice IV Epiphanea Ptolemy XIII Ptolemy XIV Cleopatra VII Philopator Ptolemy XV Caesarion
Monarchs of Cyrene	Magas Berenice II Demetrius the Fair Ptolemy VIII Physcon Ptolemy Apion Cleopatra Selene II
Seleucids	Seleucus I Nicator Antiochus I Soter Antiochus II Theos Seleucus II Callinicus Seleucus III Ceraunus Antiochus III the Great Seleucus IV Philopator Antiochus IV Epiphanes Antiochus V Eupator Demetrius I Soter Alexander I Balas Demetrius II Nicator Antiochus VI Dionysus Diodotus Tryphon Antiochus VII Sidetes Alexander II Zabinas Cleopatra Thea Seleucus V Philometor Antiochus VIII Grypus Antiochus IX Cyzicenus Seleucus VI Epiphanes Antiochus X Eusebes Antiochus XI Epiphanes Demetrius III Eucaerus Philip I Philadelphus Antiochus XII Dionysus Cleopatra Selene I Antiochus XIII Asiaticus Philip II Philoromaeus
Lysimachids	Lysimachus Ptolemy Epigonos
Attalids	Philetaerus Eumenes I Attalus I Eumenes II Attalus II Attalus III Eumenes III
Greco-Bactrians	Diodotus I Diodotus II Euthydemus I Demetrius I Euthydemus II Antimachus I Pantaleon Agathocles Demetrius II Eucratides I Plato Eucratides II Heliocles I
Indo-Greeks	Demetrius I Antimachus I Pantaleon Agathocles Apollodotus I Demetrius II Antimachus II Menander I Zoilos I Agathokleia Lysias Strato I Antialcidas Heliokles II Polyxenos Demetrius III Philoxenus Diomedes Amyntas Epander Theophilos Peukolaos Thraso Nicias Menander II Artemidoros Hermaeus Archebius Telephos Apollodotus II Hippostratos Dionysios Zoilos II Apollophanes Strato II Strato III
Monarchs of Bithynia	Boteiras Bas Zipoetes I Nicomedes I Zipoetes II Etazeta (regent) Ziaelas Prusias I Prusias II Nicomedes II Nicomedes III Nicomedes IV Socrates Chrestus
Monarchs of Pontus	Mithridates I Ctistes Ariobarzanes Mithridates II Mithridates III Pharnaces I Mithridates IV Philopator Philadephos with Laodice Mithridates V Euergetes Mithridates VI Eupator Pharnaces II Darius Arsaces Polemon I Pythodorida Polemon II
Monarchs of Commagene	Ptolemaeus Sames II Mithridates I Antiochus I Mithridates II Antiochus II Mithridates III Antiochus III Antiochus IV
Monarchs of Cappadocia	Ariarathes I Ariarathes II Ariamnes II Ariarathes III Ariarathes IV Ariarathes V Orophernes Ariarathes VI Ariarathes VII Ariarathes VIII Ariarathes IX Ariobarzanes I Ariobarzanes II Ariobarzanes III Ariarathes X Archelaus
Monarchs of the Cimmerian Bosporus	Paerisades I Satyros II Prytanis Eumelos Spartokos III Hygiainon (regent) Paerisades II Spartokos IV Leukon II Spartokos V Kamasarye Paerisades III Paerisades IV Paerisades V Mithridates I Pharnaces Asander with Dynamis Mithridates II Asander with Dynamis Scribonius's attempted rule with Dynamis Dynamis with Polemon Polemon Aspurgus Gepaepyris Mithridates III Cotys I
Monarchs of Epirus	Admetus Tharrhypas Alcetas I Neoptolemus I Arybbas Alexander I Aeacides Neoptolemus II Alcetas II Pyrrhus I Alexander II Olympias II (regent) Pyrrhus II Ptolemy Pyrrhus III Deidamia
Hellenistic rulers were preceded by Hellenistic satraps in most of their territories.

See also

References