* Tetrarchy: Diocletian divided the Roman Empire into four administrative regions, each ruled by a different emperor. This system helped to improve efficiency and reduce the risk of civil war.
* Tax reforms: Diocletian introduced a new tax system that was fairer and more equitable. This helped to reduce the burden on the poor and middle class.
* Price controls: Diocletian attempted to control prices in order to curb inflation. This policy was not always successful, but it did help to some extent.
* Military reforms: Diocletian reorganized the Roman army and created new units that were more effective against the empire's enemies.
Constantine
* Edict of Milan: Constantine legalized Christianity in the Roman Empire. This gave Christians the right to worship freely and build churches.
* New capital: Constantine moved the capital of the Roman Empire from Rome to Constantinople. This new capital was more strategically located and easier to defend.
* Administrative reforms: Constantine continued the administrative reforms of Diocletian, making the government more efficient and effective.
* Military reforms: Constantine also continued the military reforms of Diocletian, creating a stronger and more effective army.
These are just a few of the many changes that Diocletian and Constantine made to the Roman Empire. Their reforms helped to stabilize the empire and allowed it to survive for another several centuries.