Definition

1. Proper noun:
   • Roman Emperor (245-313 AD): Diocletian was a Roman emperor who, confronting significant military and administrative challenges, reorganized the empire by establishing the Tetrarchy in 286 AD. This system divided imperial rule between two senior emperors (Augusti) and two junior emperors (Caesares). He is also known for authorizing the last major persecution of Christians in the Roman Empire, beginning in 303 AD.

Usage Examples

• Proper noun:
  • The reforms of Diocletian stabilized the Roman Empire for a time.
  • Diocletian's persecution of Christians was a significant event in early Church history.
  • Historians study the reign of Diocletian to understand the transition from the Principate to the Dominate system of rule.

Advanced Usage

• "Diocletianic" (adjective): Pertaining to the reign, policies, or style of Emperor Diocletian.
  • The Diocletianic persecution was severe but ultimately failed to suppress Christianity.
  • Diocletianic architecture is noted for its monumental scale, like his palace in Split.

Variants and Related Words

• Tetrarchy (n): The system of four co-rulers established by Diocletian to govern the Roman Empire.
  • Diocletian created the Tetrarchy to manage the vast empire more effectively.
• Edict of Diocletian (n): Often refers to the Edict on Maximum Prices (301 AD) or the edicts initiating the persecution of Christians.
  • The Edict of Diocletian on Maximum Prices was an attempt to control inflation.

Synonyms

• Gaius Aurelius Valerius Diocletianus: His full Latin name.
• The Emperor Diocletian: A formal reference.

Related Phrases and Contexts

• Diocletian's Palace: The large palace complex he built for his retirement in Spalatum (modern-day Split, Croatia).
  • Diocletian's Palace in Split is a UNESCO World Heritage Site.
• The Great Persecution: The name often given to Diocletian's anti-Christian campaign (303-313 AD).
  • The Great Persecution under Diocletian ended with the Edict of Milan.
• Abdication of Diocletian: His voluntary retirement in 305 AD, a rare act for a Roman emperor.
  • The abdication of Diocletian in 305 AD was a planned part of the Tetrarchic system.

Noun

1. Roman Emperor who when faced with military problems decided in 286 to divide the Roman Empire between himself in the east and Maximian in the west; he initiated the last persecution of the Christians in 303 (245-313)